The;
Cochrane;
Hepato-Biliary;
Group,;
Copenhagen;
Trial;
Unit,;
Center;
for;
ClinicalIntervention;
Research,;
Copenhagen;
University;
Hospital,;
Rigshospitalet,;
Copenhagen,;
Denmark;
Department;
of;
Internal;
Medicine,;
Gastroenterology;
and;
Hepatology,;
University;
of;
Nis,;
Nis,;
Serbia;
Department;
of;
Internal;
Medicine;
and;
Divisione;
di;
Medicina,;
Ospedale;
V.;
Cervello,;
Palermo,;
Italy;