Endoscopic mucosal resection of early esophageal squamous cell cancer using the Duette mucosectomy kit - Seewald, S; Ang, T L; Omar, S; Groth, S; Dy, F; Zhong, Y; Seitz, U; Thonke, F; Yekebas, E; Izbicki, J; Soehendra, N (Endoscopy, 2006)