[1] Martin Luther Krankenhaus, Dept Internal Med, Inst Neurogastroenterol & Motil, Caspar Theyss Str 27-31, D-14193 Berlin, Germany
[2] Tech Univ Munich, Dept Human Biol, D-80290 Munich, Germany
[3] Tech Univ Munich, Klinikum Rechts Isar, Dept Surg, D-80290 Munich, Germany
[4] Leuven Univ Hosp, Translat Res Ctr Gastrointestinal Disorders TARGI, Leuven, Belgium
[5] Hop Charles Nicolle, Brain & Gut Lab, Digest Physiol Dept Nutr, UMR INSERM 1073, Rouen, France
[6] Charite, Div Gen Internal & Psychosomat Med, Charite Ctr Internal Med & Dermatol, D-13353 Berlin, Germany