Gupta, Sangeeta, Gaurav Gupta, Prateek Sharda, and Karan Mittal. “Study Evaluating Chronic Abdominal Pain and Functional Abdominal Pain Syndrome”. International Journal of Research in Medical Sciences 3, no. 9 (January 12, 2017): 2290–2298. Accessed October 15, 2025. https://www.msjonline.org/index.php/ijrms/article/view/1711.