Seewald Stefan, Brand Boris, Omar Salem, Yasuda Ichiro, Seitz Uwe, Mendoza Gerardo, Holzmann Tim, Groth Stefan, Thonke Frank, Soehendra Nib
Department of Interdisciplinary Endoscopy, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
Gastrointest Endosc. 2004 Apr;59(4):578-80. doi: 10.1016/s0016-5107(03)02878-5.