1. Department of Hepato-Gastroenterology and Nutrition; Caen University Hospital; Caen; France
2. Department of Statistics; Caen University Hospital; Caen; France
3. Department of Hepato-Gastroenterology; Amiens University Hospital; Amiens; France
4. Department of Hepato-Gastroenterology; Alençon Community Hospital; Alençon; France
5. Department of Hepato-Gastroenterology; Lille University Hospital; Lille; France