Saleh, Dr. Mazin, et al. “Diagnostic Differences Between Obese and Non-Obese Patients Presented With Upper Gastro-Intestinal Symptoms”. International Journal of Innovative Research in Medical Science, vol. 2, no. 08, Aug. 2017, p. 1143 to 1148, doi:10.23958/ijirms/vol02-i08/10.