Patienterne blev fulgt hver 3. måned, indtil 4 konsekutive, endoskopiske biopsiresultater ved kvartårlig opfølgning var negative for HGD, og derpå to gange om året, indtil den sidst indgåede patient havde fuldført et minimum på 24 måneders opfølgningsevalueringer efter randomisering.
Patients were followed every 3 months until 4 consecutive, quarterly follow-up endoscopic biopsy results were negative for HGD, and then biannually until the last enrolled patient had completed a minimum of 24 months of follow-up evaluations after randomisation.