1. Department of Hepato-Gastroenterology; AP-HP; Hôpital Louis Mourier; Colombes Cedex France
2. Université Paris 7; Paris France
3. Department of Hepato-Gastroenterology; Hôpital Lyon-Sud; Pierre-Bénite Cedex France
4. Université Claude Bernard Lyon; Lyon France
5. Department of Hepato-Gastroenterology; AP-HP; Hôpital Beaujon; Clichy France