TY - JOUR AU - Kandiel, A; Fraser, A G; Korelitz, B I TI - Increased risk of lymphoma among inflammatory bowel disease patients treated with azathioprine and 6-mercaptopurine JO - Gut VL - 54 PY - 2005 DO - 10.1136/gut.2004.049460 SP - 1121 EP - 1125 N1 - et al. ER -