Validation of a Non-invasive In-vitro Diagnostic Test (Peptest) Against Other Diagnostic Methods for GERD

The primary objective of this clinical study is to determine whether Peptest (Human Pepsin lateral flow in vitro diagnostic medical device) is equivalent to other GERD diagnostic methods commonly applied in clinical practice by testing a large number of clinical samples. This will be performed by evaluating Peptest results in GERD patients (Erosive esophagitis or NERD), defined using standard clinical procedures, and compared to healthy controls.