The Frequency of Eosinophilic Esophagitis in Patients With Heartburn That is Refractory to Proton Pump Inhibitors

You may not be if

• 1. Patients unwilling or unable to provide informed consent.
• 2. Allergy to lansoprazole.
• 3. Patients taking warfarin.
• 4. Coagulopathy that precludes safe biopsy of the esophagus.
• 5. Comorbidity that precludes safe participation in the study.
• 6. Pregnancy.