1. Gastroenterology Department, Centro Hospitalar S. João, Institute of Pharmacology and Therapeutics, Faculty of Medicine, University of Porto, Porto, Portugal
2. Institute for Molecular and Cell Biology, University of Porto, Porto, Portugal
3. Inserm U954 and Department of Hepato-Gastroenterology, University Hospital of Nancy, and Université Henri Poincaré 1,Vandoeuvre-lès-Nancy, France
4. Department of Gastroenterology, AP-HP, Hôpital Saint-Antoine F-75012 and ERL 1057 INSERM/UMRS 7203, UPMC Univ Paris 06F-75005, Paris, France
5. Department of Gastroenterology of University Hospital Doctor Josep Trueta de Girona, Spain
6. Department of Gynecology and Obstetrics Department, Centro Hospitalar S. João, Portugal, and Faculty of Medicine, Porto University, Porto, Portugal
7. Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
8. Department of Dermatology, Medical College of Wisconsin, WI, USA
9. Department of Internal Medicine & Hepato-Gastroenterology Unit, Medical School University of Ioannina, Ioannina, Greece
10. Departement of Biology, University of Girona, Girona, Spain
11. Gastroenterology and Hepatology Center, University Hospital Sf. Spiridon, and University of Medicine and Pharmacy Gr. T. Popa, Iasi, Romania