Irfan Ullah, Muhammad Naeem, Muhammad Bilal, Saima Sajjad, Omer Hassaan Aftab Ahmad, Shirjeel Zaheer 2022. Importance and Role of Upper Gastrointestinal Endoscopy in Diagnosis of Recurrent Abdominal Pain in Children. Pakistan Journal of Medical & Health Sciences. 16, 03 (May 2022), 1209. DOI:https://doi.org/10.53350/pjmhs221631209.