H. Zaman, J. Zeb, M. U. Farooq, M. T. Shah, S. W. Qayyum, and M. A. Abbasi, “SOCIO-DEMOGRAPHIC CHARACTERISTICS OF GASTROESOPHAGEAL REFLUX DISEASE PATIENTS”, Pak J Phsyiol, vol. 12, no. 3, pp. 40–43, May 2018.