Mehmood, Khalid, et al. “PREDICTORS OF DEPRESSION IN PATIENTS PRESENTING WITH DYSPEPTIC SYMPTOMS IN A GI CLINIC”. Journal of Ayub Medical College Abbottabad, vol. 23, no. 4, Dec. 2011, pp. 49-52, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2335.