KHAN, JEHANGIR, and MUHAMMAD JAVED. “THE INCIDENCE OF NON ULCER DYSPEPSIA AND ITS RESPONSE TO TREATMENT”. Journal of Ayub Medical College Abbottabad, vol. 13, no. 4, Nov. 2001, pp. 30-31, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/4890.