Ribeiro, A. Q.; Sevalho, G.; César, C. C. The Use of Nonsteroidal Anti-Inflammatory Drugs and the Occurrence of Gastric Lesions Among Patients Undergoing Upper Endoscopy in a University Hospital in Brazil . Clinics 2006, 61 (5), 409-416. https://doi.org/10.1590/S1807-59322006000500007.