1. Ege University School of MedicineDivision of GastroenterologyEge Reflux Study GroupBornovaIzmirTurkey
2. Cukurova University School of MedicineDivision of CardiologyAdanaTurkey
3. Yorum Consulting Ltd.Department of StatisticsIstanbulTurkey
4. Ege University Centre for Drug Research & Development Pharmacokinetic Research and Applications (ARGEFAR)BornovaIzmirTurkey