Does prophylactic administration of corticosteroid reduce the risk and severity of post-ERCP pancreatitis: a randomized, prospective, multicenter study. - Sherman,S.; Blaut,U.; Watkins,J.L.; Barnett,J.; Freeman,M.; Geenen,J.; Ryan,M.; Parker,H.; Frakes,J.T.; Fogel,E.L.; Silverman,W.B.; Dua,K.S.; et al. (Gastrointest Endosc, 2003)