Talley NJ, Abreu MT, Achkar JP, Bernstein CN, Dubinsky MC, Hanauer SB, Kane SV, Sandborn WJ, Ullman TA, Moayyedi P. An evidence-based systematic review on medical therapies for inflammatory bowel disease. Am J Gastroenterol. 2011 Apr; 106 Suppl 1:S2-25; quiz S26.