[1] Aristotle Univ Thessaloniki, Ippokrat Hosp, Sch Med, Med Clin 2, Thessaloniki, Macedonia, Greece
[2] Univ Western Macedonia, Sch Healthcare Sci, Midwifery Dept, Koila, Greece
[3] Int Hellen Univ, Sch Hlth Sci, Dept Nutr Sci & Dietet, Thessaloniki, Macedonia, Greece
[4] Natl & Kapodistrian Univ Athens, Med Sch, Dept Internal Med Propaedeut 2, Hepatogastroenterol Unit, Athens, Greece
[5] Gastroklin, Horgen, Switzerland
[6] Aristotle Univ Thessaloniki, Ippokration Hosp, Dept Internal Med, Med Clin 2, Thessaloniki 54642, Macedonia, Greece