Causes and Treatment of Recurrent Dysphagia after Self-Expanding Metal Stent Placement for Palliation of Esophageal Carcinoma - Homs, M Y V; Steyerberg, E W; Kuipers, E J; van der Gaast, A; Haringsma, J; van Blankenstein, M; Siersema, P D (Endoscopy, 2004)