 The primary objective of this study is to evaluate the efficacy of esomeprazole 20 mg once daily for 24 weeks on maintenance of Reflux Esophagitis in patients with healed reflux esophagitis in comparison with omeprazole 10 mg once daily and esomeprazole 10 mg once daily by assessment of presenceabsence of recurrence of Reflux Esophagitis throughout the treatment period from the randomisation to the treatment completion according to the Los Angeles classification. 