B. Hatami, D. Payvandi, M. Abbasinazari, and S.-M. Sadatsafavi, “Melatonin versus Zinc for Sleep Disorders in Cirrhotic Patients: A Randomized Double-Blind Pilot Trial: Melatonin or zinc in sleep disorders of cirrhosis”, Iran J Pharm Sci, vol. 22, no. 1, pp. 25–30, Jan. 2026.