1. Clinic of Social and Family Medicine, School of Medicine, University of Crete, 71003 Heraklion, Greece
2. Health Center of Kandanos, Crete, 73004 Kandanos, Greece
3. 4th Local Health Team-Municipality Practice and Academic Unit of Heraklion, Crete, 71303 Heraklion, Greece
4. Department of Gastroenterology and Hepatology, Antwerp University Hospital, University of Antwerp, 2650 Edegem, Belgium
5. La Mina Primary Health Care Centre, IDIAP Jordi Gol, 08003 Barcelona, Spain
6. European Society for Primary Care Gastroenterology, London E1 6HU, UK
7. Clinic of Cardiology, University Hospital of Heraklion, Crete, 70013 Heraklion, Greece
8. Department of Family Medicine, Care and Public Health Research Institute (CAPHRI), Maastricht University, 6229 Maastricht, The Netherlands
9. Department of Gastroenterology, National and Kapodistrian University of Athens, 11527 Athens, Greece
10. Gastroenterology Department, Medical School, National and Kapodistrian University of Athens, General Hospital of Athens “Laiko”, 11527 Athens, Greece
11. Clinic of Gastroenterology & Hepatology, University Hospital of Heraklion, 70013 Heraklion, Greece