Efficacy of Endoscopic Retrograde Cholecystoendoprosthesis (ERCCE) for Cholecystitis - Tamada, K; Seki, H; Sato, K; Kano, T; Sugiyama, S; Ichiyama, M; Wada, S; Ohashi, A; Tomiyama, G; Ueno, A; Yaman Aka, T; Kimura, K (Endoscopy, 1991)