Roeb E, Rummel M, Blau W, Etschmann B, Gattenlöhner S
Division of Gastroenterology, Department of Internal Medicine, University Hospital, Justus Liebig University, Giessen, Germany.
Endoscopy. 2011;43 Suppl 2 UCTN:E344-5. doi: 10.1055/s-0030-1256841. Epub 2011 Oct 21.