Yaseen, S. M., & Ahmed, S. K. (2019). Prospective Study of Upper Gastro Intestinal Tract Endoscopy Finding and its Relation to Smoking in Baquba Teaching Hospital. Diyala Journal of Medicine, 8(2), 46–54. Retrieved from https://djm.uodiyala.edu.iq/index.php/djm/article/view/309