Saeid , Maryam, Mahboobe Taher, Hamid Vahedi, and Abbas Ali Hosseinkhanzadeh. “Structural Modeling of Functional Disability Severity Based on Health-Promoting Lifestyle and Distress Tolerance: The Mediating Role of Ego Strength in Patients With Functional Gastrointestinal Disorders”. Health Nexus 4, no. 2 (June 1, 2026): 1–15. Accessed September 7, 2026. https://www.journals.kmanpub.com/index.php/Health-Nexus/article/view/5948.