[1] Kantonsspital St Gallen, Liver Biol Lab, St Gallen, Switzerland
[2] Kantonsspital St Gallen, Inst Immunobiol, St Gallen, Switzerland
[3] Univ Bern, Inst Anat, Bern, Switzerland
[4] Kantonsspital St Gallen, Div Gastroenterol & Hepatol, CH-9007 St Gallen, Switzerland