Daum Severin, Loddenkemper Christoph, Schneider Thomas
Department of Medicine I, Gastroenterology, Infectious Diseases and Rheumatology, Charite-Medical School Berlin, Campus Benjamin Franklin, Berlin, Germany.
Clin Gastroenterol Hepatol. 2007 Jul;5(7):e27-8. doi: 10.1016/j.cgh.2007.04.020.