Department of Gastroenterology and Hepatology;
Ziekenhuis Oost Limburg;
Genk;
Belgium;
Department of Psychiatry;
Ziekenhuis Oost Limburg;
Genk;
Belgium;
Department of Psychiatry and Neuro-psychiatry;
South Limburg Mental Health Research and Teaching Network;
EURON;
Maastricht University;
Maastricht;
The Netherlands;
Center for Statistics;
Limburgs Universitair Centrum;
Diepenbeek;
Belgium;
Department of Hepatology;
Katholieke Universiteit Leuven;
Leuven;
Belgium;
Division of Gastroenterology and Hepatology;
University Hospital;
Antwerp;
Belgium;
Laboratory of Clinical and Epidemiological Virology;
Department of Microbiology and Immunology;
Rega Institute and University Hospitals;
Katholieke Universiteit Leuven;
Leuven;
Belgium;
Department of General Practice;
Katholieke Universiteit Leuven;
Leuven;
Belgium and Department of General Practice;
Maastricht University;
The Netherlands;