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Piotr Witkowski

TitleAssociate Professor
InstitutionUniversity of Chicago
DepartmentSurgery-Transplant
AddressChicago IL 60637
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    Collapse Overview 
    Collapse overview
    Pancreatic Islet Transplantation, Director
    ASTS Transplant Surgery Fellowship, Director
    Polish American Transplant Center, Director


    Collapse Biography 
    Collapse education and training
    Columbia Presbyterian Hospital , New York, NY06/2009Transplant Surgery Fellowship
    Columbia University , New York, NY06/2007Research Fellowship in Transplantation

    Collapse ORNG Applications 
    Collapse Websites

    Collapse Research 
    Collapse research activities and funding
         (Piotr Witkowski)Nov 1, 2018
    Sernova/JDRF
    A Safety, Tolerability and Efficacy Study of Sernova Cell Pouch™ for Clinical Islet Transplantation. Phase 1/2 Clinical Study.
    Role Description: The goal is to assess safety and effectiveness of islet transplantation into prevascularized Sernova Cell Pouch in the abdominal muscles in patients with brittle type 1 diabetus mellitus.
    Role: Principal Investigator

    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Bachul PJ, Golebiewska JE, Basto L, Golab K, Anteby R, Wang LJ, Tibudan M, Thomas C, Fendler W, Lucander A, Grybowski DJ, Debska-Slizien A, Fung J, Witkowski P. BETA-2 score is an early predictor of graft decline and loss of insulin independence after pancreatic islet allotransplantation. Am J Transplant. 2019 Oct 09. PMID: 31597009.
      View in: PubMed
    2. Lara LF, Bellin MD, Ugbarugba E, Nathan JD, Witkowski P, Wijkstrom M, Steel JL, Smith KD, Singh VK, Schwarzenberg SJ, Pruett TL, Naziruddin B, Long-Simpson L, Kirchner VA, Gardner TB, Freeman ML, Dunn TB, Chinnakotla S, Beilman GJ, Adams DB, Morgan KA, Abu-El-Haija MA, Ahmad S, Posselt AM, Hughes MG, Conwell DL. A Study on the Effect of Patient Characteristics, Geographical Utilization, and Patient Outcomes for Total Pancreatectomy Alone and Total Pancreatectomy With Islet Autotransplantation in Patients With Pancreatitis in the United States. Pancreas. 2019 Oct; 48(9):1204-1211. PMID: 31593020.
      View in: PubMed
    3. Savari O, Golab K, Solomina J, Konsur E, Cieply K, Ramachandran S, Tekin Z, Schenck L, Zhang SS, Tibudan M, Posner MC, Witkowski P. Total Pancreatectomy with Islet Autotransplantation for the Ampullary Cancer. A Case Report. J Gastrointest Cancer. 2019 09; 50(3):543-547. PMID: 29159772.
      View in: PubMed
    4. Golebiewska JE, Bachul PJ, Fillman N, Kijek MR, Basto L, Para M, Perea L, Golab K, Wang LJ, Tibudan M, Debska-Slizien A, Matthews JB, Fung J, Witkowski P. Early Infectious Complications After Total Pancreatectomy with Islet Autotransplantation: a Single Center Experience. J Gastrointest Surg. 2019 Nov; 23(11):2201-2210. PMID: 30719679.
      View in: PubMed
    5. Dybala MP, Olehnik SK, Fowler JL, Golab K, Millis JM, Golebiewska J, Bachul P, Witkowski P, Hara M. Pancreatic beta cell/islet mass and body mass index. Islets. 2019; 11(1):1-9. PMID: 30668226.
      View in: PubMed
    6. Golebiewska JE, Bachul PJ, Wang LJ, Matosz S, Basto L, Kijek MR, Fillman N, Golab K, Tibudan M, Debska-Slizien A, Millis JM, Fung J, Witkowski P. Validation of a New North American Islet Donor Score for Donor Pancreas Selection and Successful Islet Isolation in a Medium-Volume Islet Transplant Center. Cell Transplant. 2019 02; 28(2):185-194. PMID: 30520321.
      View in: PubMed
    7. Golebiewska JE, Bachul PJ, Fillman N, Basto L, Kijek MR, Golab K, Wang LJ, Tibudan M, Thomas C, Debska-Slizien A, Gelrud A, Matthews JB, Millis JM, Fung J, Witkowski P. Assessment of simple indices based on a single fasting blood sample as a tool to estimate beta-cell function after total pancreatectomy with islet autotransplantation - a prospective study. Transpl Int. 2019 03; 32(3):280-290. PMID: 30353611.
      View in: PubMed
    8. Bellin MD, Abu-El-Haija M, Morgan K, Adams D, Beilman GJ, Chinnakotla S, Conwell DL, Dunn TB, Freeman ML, Gardner T, Kirchner VA, Lara LF, Long-Simpson L, Nathan JD, Naziruddin B, Nyman JA, Pruett TL, Schwarzenberg SJ, Singh VK, Smith K, Steel JL, Wijkstrom M, Witkowski P, Hodges JS. A multicenter study of total pancreatectomy with islet autotransplantation (TPIAT): POST (Prospective Observational Study of TPIAT). Pancreatology. 2018 Apr; 18(3):286-290. PMID: 29456124.
      View in: PubMed
    9. Golebiewska JE, Solomina J, Thomas C, Kijek MR, Bachul PJ, Basto L, Golab K, Wang LJ, Fillman N, Tibudan M, Cieply K, Philipson L, Debska-Slizien A, Millis JM, Fung J, Witkowski P. Comparative evaluation of simple indices using a single fasting blood sample to estimate beta cell function after islet transplantation. Am J Transplant. 2018 04; 18(4):990-997. PMID: 29218834.
      View in: PubMed
    10. Fuchs A, Gliwinski M, Grageda N, Spiering R, Abbas AK, Appel S, Bacchetta R, Battaglia M, Berglund D, Blazar B, Bluestone JA, Bornhäuser M, Ten Brinke A, Brusko TM, Cools N, Cuturi MC, Geissler E, Giannoukakis N, Golab K, Hafler DA, van Ham SM, Hester J, Hippen K, Di Ianni M, Ilic N, Isaacs J, Issa F, Iwaszkiewicz-Grzes D, Jaeckel E, Joosten I, Klatzmann D, Koenen H, van Kooten C, Korsgren O, Kretschmer K, Levings M, Marek-Trzonkowska NM, Martinez-Llordella M, Miljkovic D, Mills KHG, Miranda JP, Piccirillo CA, Putnam AL, Ritter T, Roncarolo MG, Sakaguchi S, Sánchez-Ramón S, Sawitzki B, Sofronic-Milosavljevic L, Sykes M, Tang Q, Vives-Pi M, Waldmann H, Witkowski P, Wood KJ, Gregori S, Hilkens CMU, Lombardi G, Lord P, Martinez-Caceres EM, Trzonkowski P. Minimum Information about T Regulatory Cells: A Step toward Reproducibility and Standardization. Front Immunol. 2017; 8:1844. PMID: 29379498.
      View in: PubMed
    11. Xiao X, Guo P, Shiota C, Zhang T, Coudriet GM, Fischbach S, Prasadan K, Fusco J, Ramachandran S, Witkowski P, Piganelli JD, Gittes GK. Endogenous Reprogramming of Alpha Cells into Beta Cells, Induced by Viral Gene Therapy, Reverses Autoimmune Diabetes. Cell Stem Cell. 2018 01 04; 22(1):78-90.e4. PMID: 29304344.
      View in: PubMed
    12. Golab K, Grose R, Placencia V, Wickrema A, Solomina J, Tibudan M, Konsur E, Cieply K, Marek-Trzonkowska N, Trzonkowski P, Millis JM, Fung J, Witkowski P. Cell banking for regulatory T cell-based therapy: strategies to overcome the impact of cryopreservation on the Treg viability and phenotype. Oncotarget. 2018 Feb 09; 9(11):9728-9740. PMID: 29515766.
      View in: PubMed
    13. Golebiewska J, Solomina J, Kijek MR, Kotukhov A, Basto L, Golab K, Bachul PJ, Konsur E, Cieply K, Fillman N, Wang LJ, Thomas CC, Philipson LH, Tibudan M, Krenc A, Debska-Slizien A, Fung J, Witkowski P. External Validation of the Newly Developed BETA-2 Scoring System for Pancreatic Islet Graft Function Assessment. Transplant Proc. 2017 Dec; 49(10):2340-2346. PMID: 29198674.
      View in: PubMed
    14. Solomina J, Golebiewska J, Kijek MR, Kotukhov A, Bachul PJ, Basto L, Golab K, Konsur E, Cieply K, Fillman N, Wang LJ, Thomas CC, Philipson LH, Tibudan M, Debska-Slizien A, Fung J, Gelrud A, Matthews JB, Witkowski P. Pain Control, Glucose Control, and Quality of Life in Patients With Chronic Pancreatitis After Total Pancreatectomy With Islet Autotransplantation: A Preliminary Report. Transplant Proc. 2017 Dec; 49(10):2333-2339. PMID: 29198673.
      View in: PubMed
    15. Marek-Trzonkowska N, Mysliwiec M, Iwaszkiewicz-Grzes D, Gliwinski M, Derkowska I, Zalinska M, Zielinski M, Grabowska M, Zielinska H, Piekarska K, Jazwinska-Curyllo A, Owczuk R, Szadkowska A, Wyka K, Witkowski P, Mlynarski W, Jarosz-Chobot P, Bossowski A, Siebert J, Trzonkowski P. Factors affecting long-term efficacy of T regulatory cell-based therapy in type 1 diabetes. J Transl Med. 2016 12 01; 14(1):332. PMID: 27903296.
      View in: PubMed
    16. Golab K, Grose R, Trzonkowski P, Wickrema A, Tibudan M, Marek-Trzonkowska N, Matosz S, Solomina J, Ostrega D, Michael Millis J, Witkowski P. Utilization of leukapheresis and CD4 positive selection in Treg isolation and the ex-vivo expansion for a clinical application in transplantation and autoimmune disorders. Oncotarget. 2016 Nov 29; 7(48):79474-79484. PMID: 27821811.
      View in: PubMed
    17. Tekin Z, Garfinkel MR, Chon WJ, Schenck L, Golab K, Savari O, Thistlethwaite JR, Philipson LH, Majewski C, Pannain S, Ramachandran S, Rezania K, Hariprasad SM, Millis JM, Witkowski P. Outcomes of Pancreatic Islet Allotransplantation Using the Edmonton Protocol at the University of Chicago. Transplant Direct. 2016 Oct; 2(10):e105. PMID: 27795987.
      View in: PubMed
    18. Wang LJ, Kin T, O'Gorman D, Shapiro AMJ, Naziruddin B, Takita M, Levy MF, Posselt AM, Szot GL, Savari O, Barbaro B, McGarrigle J, Yeh CC, Oberholzer J, Lei J, Chen T, Lian M, Markmann JF, Alvarez A, Linetsky E, Ricordi C, Balamurugan AN, Loganathan G, Wilhelm JJ, Hering BJ, Bottino R, Trucco M, Liu C, Min Z, Li Y, Naji A, Fernandez LA, Ziemelis M, Danobeitia JS, Millis JM, Witkowski P. A Multicenter Study: North American Islet Donor Score in Donor Pancreas Selection for Human Islet Isolation for Transplantation. Cell Transplant. 2016; 25(8):1515-1523. PMID: 26922947.
      View in: PubMed
    19. Xiao X, Fischbach S, Song Z, Gaffar I, Zimmerman R, Wiersch J, Prasadan K, Shiota C, Guo P, Ramachandran S, Witkowski P, Gittes GK. Transient Suppression of TGFß Receptor Signaling Facilitates Human Islet Transplantation. Endocrinology. 2016 Apr; 157(4):1348-56. PMID: 26872091.
      View in: PubMed
    20. Chon WJ, Kadambi PV, Xu C, Becker YT, Witkowski P, Pursell K, Kane B, Josephson MA. Use of leflunomide in renal transplant recipients with ganciclovir-resistant/refractory cytomegalovirus infection: a case series from the University of Chicago. Case Rep Nephrol Dial. 2015 Jan-Apr; 5(1):96-105. PMID: 26000278.
      View in: PubMed
    21. Savari O, Golab K, Wang LJ, Schenck L, Grose R, Tibudan M, Ramachandran S, Chon WJ, Posner MC, Millis JM, Matthews JB, Gelrud A, Witkowski P. Preservation of beta cell function after pancreatic islet autotransplantation: University of Chicago experience. Am Surg. 2015 Apr; 81(4):421-7. PMID: 25831191.
      View in: PubMed
    22. Poudel A, Savari O, Striegel DA, Periwal V, Taxy J, Millis JM, Witkowski P, Atkinson MA, Hara M. Beta-cell destruction and preservation in childhood and adult onset type 1 diabetes. Endocrine. 2015 Aug; 49(3):693-702. PMID: 25605478.
      View in: PubMed
    23. Corritore E, Dugnani E, Pasquale V, Misawa R, Witkowski P, Lei J, Markmann J, Piemonti L, Sokal EM, Bonner-Weir S, Lysy PA. ß-Cell differentiation of human pancreatic duct-derived cells after in vitro expansion. Cell Reprogram. 2014 Dec; 16(6):456-66. PMID: 25437872.
      View in: PubMed
    24. Krzystyniak A, Golab K, Witkowski P, Trzonkowski P. Islet cell transplant and the incorporation of Tregs. Curr Opin Organ Transplant. 2014 Dec; 19(6):610-5. PMID: 25304813.
      View in: PubMed
    25. Bailey KA, Savic D, Zielinski M, Park SY, Wang LJ, Witkowski P, Brady M, Hara M, Bell GI, Nobrega MA. Evidence of non-pancreatic beta cell-dependent roles of Tcf7l2 in the regulation of glucose metabolism in mice. Hum Mol Genet. 2015 Mar 15; 24(6):1646-54. PMID: 25398947.
      View in: PubMed
    26. Hoang DT, Matsunari H, Nagaya M, Nagashima H, Millis JM, Witkowski P, Periwal V, Hara M, Jo J. A conserved rule for pancreatic islet organization. PLoS One. 2014; 9(10):e110384. PMID: 25350558.
      View in: PubMed
    27. Wang LJ, Cochet O, Wang XJ, Krzystyniak A, Misawa R, Golab K, Tibudan M, Grose R, Savari O, Millis JM, Witkowski P. Donor height in combination with islet donor score improves pancreas donor selection for pancreatic islet isolation and transplantation. Transplant Proc. 2014 Jul-Aug; 46(6):1972-4. PMID: 25131085.
      View in: PubMed
    28. Golab K, Kizilel S, Bal T, Hara M, Zielinski M, Grose R, Savari O, Wang XJ, Wang LJ, Tibudan M, Krzystyniak A, Marek-Trzonkowska N, Millis JM, Trzonkowski P, Witkowski P. Improved coating of pancreatic islets with regulatory T cells to create local immunosuppression by using the biotin-polyethylene glycol-succinimidyl valeric acid ester molecule. Transplant Proc. 2014 Jul-Aug; 46(6):1967-71. PMID: 25131084.
      View in: PubMed
    29. Wang LJ, Kissler HJ, Wang X, Cochet O, Krzystyniak A, Misawa R, Golab K, Tibudan M, Grzanka J, Savari O, Kaufman DB, Millis M, Witkowski P. Application of Digital Image Analysis to Determine Pancreatic Islet Mass and Purity in Clinical Islet Isolation and Transplantation. Cell Transplant. 2015; 24(7):1195-204. PMID: 24806436.
      View in: PubMed
    30. Guo H, Xiong Y, Witkowski P, Cui J, Wang LJ, Sun J, Lara-Lemus R, Haataja L, Hutchison K, Shan SO, Arvan P, Liu M. Inefficient translocation of preproinsulin contributes to pancreatic ß cell failure and late-onset diabetes. J Biol Chem. 2014 Jun 06; 289(23):16290-302. PMID: 24770419.
      View in: PubMed
    31. Marek-Trzonkowska N, Mysliwiec M, Dobyszuk A, Grabowska M, Derkowska I, Juscinska J, Owczuk R, Szadkowska A, Witkowski P, Mlynarski W, Jarosz-Chobot P, Bossowski A, Siebert J, Trzonkowski P. Therapy of type 1 diabetes with CD4(+)CD25(high)CD127-regulatory T cells prolongs survival of pancreatic islets - results of one year follow-up. Clin Immunol. 2014 Jul; 153(1):23-30. PMID: 24704576.
      View in: PubMed
    32. Witkowski P, Savari O, Matthews JB. Islet autotransplantation and total pancreatectomy. Adv Surg. 2014; 48:223-33. PMID: 25293618.
      View in: PubMed
    33. Wang LJ, Young S, Misawa R, Azzam R, Wang X, Golab K, Cochet O, Savari O, Tibudan M, Millis JM, Matthews JB, Witkowski P. Chronic pancreatitis and primary sclerosing cholangitis--first report of intrahepatic autologous islet transplantation. J Gastrointest Surg. 2014 Apr; 18(4):845-50. PMID: 24297649.
      View in: PubMed
    34. Savari O, Zielinski MC, Wang X, Misawa R, Millis JM, Witkowski P, Hara M. Distinct function of the head region of human pancreas in the pathogenesis of diabetes. Islets. 2013 Sep-Dec; 5(5):226-8. PMID: 24045229.
      View in: PubMed
    35. Wang X, Misawa R, Zielinski MC, Cowen P, Jo J, Periwal V, Ricordi C, Khan A, Szust J, Shen J, Millis JM, Witkowski P, Hara M. Regional differences in islet distribution in the human pancreas--preferential beta-cell loss in the head region in patients with type 2 diabetes. PLoS One. 2013; 8(6):e67454. PMID: 23826303.
      View in: PubMed
    36. Yin H, Park SY, Wang XJ, Misawa R, Grossman EJ, Tao J, Zhong R, Witkowski P, Bell GI, Chong AS. Enhancing pancreatic Beta-cell regeneration in vivo with pioglitazone and alogliptin. PLoS One. 2013; 8(6):e65777. PMID: 23762423.
      View in: PubMed
    37. Wang XJ, Leveson-Gower D, Golab K, Wang LJ, Marek-Trzonkowska N, Krzystyniak A, Wardowska A, Millis JM, Trzonkowski P, Witkowski P. Influence of pharmacological immunomodulatory agents on CD4(+)CD25(high)FoxP3(+) T regulatory cells in humans. Int Immunopharmacol. 2013 Jul; 16(3):364-70. PMID: 23499512.
      View in: PubMed
    38. Golab K, Krzystyniak A, Marek-Trzonkowska N, Misawa R, Wang LJ, Wang X, Cochet O, Tibudan M, Langa P, Millis JM, Trzonkowski P, Witkowski P. Impact of culture medium on CD4(+) CD25(high)CD127(lo/neg) Treg expansion for the purpose of clinical application. Int Immunopharmacol. 2013 Jul; 16(3):358-63. PMID: 23466550.
      View in: PubMed
    39. Golab K, Leveson-Gower D, Wang XJ, Grzanka J, Marek-Trzonkowska N, Krzystyniak A, Millis JM, Trzonkowski P, Witkowski P. Challenges in cryopreservation of regulatory T cells (Tregs) for clinical therapeutic applications. Int Immunopharmacol. 2013 Jul; 16(3):371-5. PMID: 23428908.
      View in: PubMed
    40. Grzanka J, Leveson-Gower D, Golab K, Wang XJ, Marek-Trzonkowska N, Krzystyniak A, Wardowska A, Mills JM, Trzonkowski P, Witkowski P. FoxP3, Helios, and SATB1: roles and relationships in regulatory T cells. Int Immunopharmacol. 2013 Jul; 16(3):343-7. PMID: 23428911.
      View in: PubMed
    41. Wang X, Zielinski MC, Misawa R, Wen P, Wang TY, Wang CZ, Witkowski P, Hara M. Quantitative analysis of pancreatic polypeptide cell distribution in the human pancreas. PLoS One. 2013; 8(1):e55501. PMID: 23383206.
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    42. Barton FB, Rickels MR, Alejandro R, Hering BJ, Wease S, Naziruddin B, Oberholzer J, Odorico JS, Garfinkel MR, Levy M, Pattou F, Berney T, Secchi A, Messinger S, Senior PA, Maffi P, Posselt A, Stock PG, Kaufman DB, Luo X, Kandeel F, Cagliero E, Turgeon NA, Witkowski P, Naji A, O'Connell PJ, Greenbaum C, Kudva YC, Brayman KL, Aull MJ, Larsen C, Kay TW, Fernandez LA, Vantyghem MC, Bellin M, Shapiro AM. Improvement in outcomes of clinical islet transplantation: 1999-2010. Diabetes Care. 2012 Jul; 35(7):1436-45. PMID: 22723582.
      View in: PubMed
    43. Marek-Trzonkowska N, Mysliwiec M, Dobyszuk A, Grabowska M, Techmanska I, Juscinska J, Wujtewicz MA, Witkowski P, Mlynarski W, Balcerska A, Mysliwska J, Trzonkowski P. Administration of CD4+CD25highCD127- regulatory T cells preserves ß-cell function in type 1 diabetes in children. Diabetes Care. 2012 Sep; 35(9):1817-20. PMID: 22723342.
      View in: PubMed
    44. Kilimnik G, Zhao B, Jo J, Periwal V, Witkowski P, Misawa R, Hara M. Altered islet composition and disproportionate loss of large islets in patients with type 2 diabetes. PLoS One. 2011; 6(11):e27445. PMID: 22102895.
      View in: PubMed
    45. Marek N, Krzystyniak A, Ergenc I, Cochet O, Misawa R, Wang LJ, Golab K, Wang X, Kilimnik G, Hara M, Kizilel S, Trzonkowski P, Millis JM, Witkowski P. Coating human pancreatic islets with CD4(+)CD25(high)CD127(-) regulatory T cells as a novel approach for the local immunoprotection. Ann Surg. 2011 Sep; 254(3):512-8; discussion 518-9. PMID: 21865948.
      View in: PubMed
    46. Marek N, Bieniaszewska M, Krzystyniak A, Juscinska J, Mysliwska J, Witkowski P, Hellmann A, Trzonkowski P. The time is crucial for ex vivo expansion of T regulatory cells for therapy. Cell Transplant. 2011; 20(11-12):1747-58. PMID: 21457615.
      View in: PubMed
    47. Kim A, Kilimnik G, Guo C, Sung J, Jo J, Periwal V, Witkowski P, Dilorio P, Hara M. Computer-assisted large-scale visualization and quantification of pancreatic islet mass, size distribution and architecture. J Vis Exp. 2011 Mar 04; (49). PMID: 21403638.
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    48. Chang CC, Vlad G, D'Agati VD, Liu Z, Zhang QY, Witkowski P, Torkamani AA, Stokes MB, Ho EK, Cortesini R, Suciu-Foca N. BCL6 is required for differentiation of Ig-like transcript 3-Fc-induced CD8+ T suppressor cells. J Immunol. 2010 Nov 15; 185(10):5714-22. PMID: 20935202.
      View in: PubMed
    49. Kizilel S, Scavone A, Liu X, Nothias JM, Ostrega D, Witkowski P, Millis M. Encapsulation of pancreatic islets within nano-thin functional polyethylene glycol coatings for enhanced insulin secretion. Tissue Eng Part A. 2010 Jul; 16(7):2217-28. PMID: 20163204.
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    50. Hardy MA, Witkowski P, Sondermeijer H, Harris P. The long road to pancreatic islet transplantation. World J Surg. 2010 Apr; 34(4):625-7. PMID: 19830482.
      View in: PubMed
    51. Witkowski P, Sondermeijer H, Hardy MA, Woodland DC, Lee K, Bhagat G, Witkowski K, See F, Rana A, Maffei A, Itescu S, Harris PE. Islet grafting and imaging in a bioengineered intramuscular space. Transplantation. 2009 Nov 15; 88(9):1065-74. PMID: 19898201.
      View in: PubMed
    52. Halazun KJ, Hardy MA, Rana AA, Woodland DC, Luyten EJ, Mahadev S, Witkowski P, Siegel AB, Brown RS, Emond JC. Negative impact of neutrophil-lymphocyte ratio on outcome after liver transplantation for hepatocellular carcinoma. Ann Surg. 2009 Jul; 250(1):141-51. PMID: 19561458.
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    53. Rana A, Robles S, Russo MJ, Halazun KJ, Woodland DC, Witkowski P, Ratner LE, Hardy MA. The combined organ effect: protection against rejection? Ann Surg. 2008 Nov; 248(5):871-9. PMID: 18948817.
      View in: PubMed
    54. Witkowski P, Herold KC. Islet transplantation for type 1 diabetes--where should we go? Nat Clin Pract Endocrinol Metab. 2007 Jan; 3(1):2-3. PMID: 17179921.
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    55. Witkowski P, Trabucco EE. Is there an increased risk of the vas deferens occlusion after mesh inguinal hernioplasty and what can we do about it? Ann Surg. 2007 Jan; 245(1):153-4. PMID: 17197981.
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    56. Simpson NR, Souza F, Witkowski P, Maffei A, Raffo A, Herron A, Kilbourn M, Jurewicz A, Herold K, Liu E, Hardy MA, Van Heertum R, Harris PE. Visualizing pancreatic beta-cell mass with [11C]DTBZ. Nucl Med Biol. 2006 Oct; 33(7):855-64. PMID: 17045165.
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    57. Witkowski P, Zakai SB, Rana A, Sledzinski Z, Hardy MA. Pancreatic islet transplantation, what has been achieved since Edmonton break-through. Ann Transplant. 2006; 11(2):5-13; discussion 32-43. PMID: 17494283.
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    58. Liu J, Liu Z, Witkowski P, Vlad G, Manavalan JS, Scotto L, Kim-Schulze S, Cortesini R, Hardy MA, Suciu-Foca N. Rat CD8+ FOXP3+ T suppressor cells mediate tolerance to allogeneic heart transplants, inducing PIR-B in APC and rendering the graft invulnerable to rejection. Transpl Immunol. 2004 Dec; 13(4):239-47. PMID: 15589736.
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    59. Maffei A, Liu Z, Witkowski P, Moschella F, Del Pozzo G, Liu E, Herold K, Winchester RJ, Hardy MA, Harris PE. Identification of tissue-restricted transcripts in human islets. Endocrinology. 2004 Oct; 145(10):4513-21. PMID: 15231694.
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    60. Oluwole SF, Oluwole OO, DePaz HA, Adeyeri AO, Witkowski P, Hardy MA. CD4+CD25+ regulatory T cells mediate acquired transplant tolerance. Transpl Immunol. 2003 Jul-Sep; 11(3-4):287-93. PMID: 12967782.
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