458
Participants
Start Date
January 1, 2020
Primary Completion Date
June 30, 2022
Study Completion Date
June 30, 2022
High-Resolution Manometry, Upper-GI endoscopy, pH-Impedance testing
High-Resolution Manometry Upper-GI endoscopy pH-Impedance testing
Department of General, Visceral, Tumor and Transplantation Surgery, University Hospital Cologne, Cologne
Evangelic Hospital Kalk Cologne
OTHER