[1] Hannover Med Sch, Klin Gastroenterol Hepatol & Endokrinol, D-30623 Hannover, Germany
[2] Tech Univ Munich, Inst Virol, D-8000 Munich, Germany
[3] Univ Klinikum Leipzig, Sekt Hepatol, Klin & Poliklin Gastroenterolgie & Rheumatol, Leipzig, Germany
[4] Univ Regensburg, Inst Med Mikrobiol & Hyg, D-8400 Regensburg, Germany
[5] Univ Dusseldorf, Klin Gastroenterol Hepatol & Infektol, D-4000 Dusseldorf, Germany
[6] Univ Witten Herdecke, Zentrum Kinder & Jugendmed, Witten, Germany
[7] Goethe Univ Frankfurt, Med Klin 1, D-6000 Frankfurt, Germany
[8] Univ Halle Wittenberg, Klin & Poliklin Innere Med 1, D-4010 Halle, Germany
[9] Univ Klinikum Heidelberg, Inst Pathol, Heidelberg, Germany
[10] Univ Marburg, AWMF Inst Med Wissensmanagement, D-35032 Marburg, Germany