Prevalence of fibromyalgia in Egyptian patients with systemic lupus erythematosus and its impact on health-related quality of life - Samar Tharwat; Rahma A. Elziaty; Fatma Hamdy; Abdelrahman Mohamed Elsayed; Esraa A. Talaat; Enas S. Zahran (Advances in Rheumatology, 2026)