Multivariate Analysis for Factors Predicting Rapid Response of Leukocytapheresis in Patients With Steroid‐resistant Ulcerative Colitis: A Multicenter Prospective Open‐label StudyTakayuki Matsumoto, Yoshihide Fujiyama, Kiyotaka Okawa et al.|Therapeutic Apheresis and Dialysis|2008Cited by 23