Khayyat, Yasir Mohammed. “UNDIAGNOSED CELIAC DISEASE IN PATIENTS PRESENTING WITH IRRITABLE BOWEL SYNDROME SYMPTOMS”. Journal of Ayub Medical College Abbottabad, vol. 32, no. 1, Jan. 2020, pp. 18-23, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/5922.