Saeid , M.; Taher, M.; Vahedi , H. .; Hosseinkhanzadeh , A. A. . 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. HN 2026, 4 (2), 1-15.