[1] McGill Univ, Dept Med, Div Gastroenterol & Hepatol, Hlth Ctr, Montreal, PQ, Canada
[2] McGill Univ, Dept Med, Div Nephrol, Hlth Ctr, Montreal, PQ, Canada
[3] McGill Univ, Dept Med, Chron Viral Illness Serv, Hlth Ctr, Montreal, PQ, Canada
[4] Univ Modena & Reggio Emilia, Modena, Italy
[5] McGill Univ, Dept Family Med, Hlth Ctr, Montreal, PQ, Canada