An increase in the serum amylase level in patients after peroral double-balloon enteroscopy: an association with the development of pancreatitis - Honda, K; Itaba, S; Mizutani, T; Sumida, Y; Kanayama, K; Higuchi, N; Yoshinaga, S; Akiho, H; Kawabe, K; Arita, Y; Ito, T; Nakamura, K; Takayanagi, R (Endoscopy, 2006)