[1] Univ Hosp Brest, Hepato Gastroenterol Unit, Brest, BELARUS
[2] Creil Hosp, Hepato Gastroenterol Unit, Creil, France
[3] Univ Hosp Bondy, Hepato Gastroenterol Unit, Bondy, France
[4] Univ Hosp Amiens, Hepato Gastroenterol Unit, Amiens, France
[5] Beaujon Hosp, INSERM, U 773, Clichy, France
[6] Univ Hosp Besancon, Hepato Gastroenterol Unit, Besancon, France
[7] Univ Hosp Poitiers, Hepato Gastroenterol Unit, Poitiers, France
[8] Univ Hosp Toulouse, Hepato Gastroenterol Unit, Toulouse, France