1. Department of Medicine, Second Medical ClinicAristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki Macedonia Greece
2. Department of General Internal MedicineUniversity Hospital Inselspital Bern Switzerland
3. Department of Gastroenterology401 General Military Hospital of Athens Athens Greece
4. The First Department of Pharmacology, Department of MedicineAristotle University of Thessaloniki, Ippokration Hospital, Thessaloniki Macedonia Greece
5. St. Elisabeth‐Hospital Herten GmbH Herten Germany
6. Department of NeurologyUniversity Hospital of Larissa, University of Thessaly Larissa Greece
7. Department of NeurologyPapageorgiou General Hospital, Thessaloniki Macedonia Greece