1 Nutrition Unit, Hospital General Universitario Gregorio Marañón, Madrid, Spain. Electronic address: [email protected].
2 Department of Gastroenterology and Clinical Nutrition, Archet Hospital, University of Nice Sophia Antipolis, Nice, France.
3 Department of Gastroenterology, Clinic of Intestinal Diseases and Nutritional Support, Hopital Erasme, Free University of Brussels, Brussels, Belgium.