Landman J, Olweny E, Sundaram CP, Chen C, Rehman J, Lee DI, Shalhav A, Portis A, McDougall EM, Clayman RV. Prospective comparison of the immunological and stress response following laparoscopic and open surgery for localized renal cell carcinoma. J Urol. 2004 Apr; 171(4):1456-60.