<qa>  What is the endoscopy that has been confirmed to have healing of?5. Has been confirmed on endoscopy to have healing of erosive esophagitis. This endoscopy, if not part of the TAK-438_303 study, must have been within the last 14 days prior to randomization, otherwise the endoscopy must be repeated to confirm healing before randomization in the TAK-438_305 study. 