Development of Esophageal Cancer after Endoscopic Injection Sclerotherapy for Esophageal Varices: Three Case Reports - Ohta, M; Kuwano, H; Hashizume, M; Sonoda, T; Tomikawa, M; Higashi, H; Ohno, S; Watanabe, M; Sugimachi, K (Endoscopy, 1995)