Kamkar, Mohammad Zaman, Sommayeh Rezvani Khorshidi, Seideh Mahrokh Alinaghi Maddah, Amir Emami Zeydi, and Mahnaz Modanloo. 2018. “A Cross-Sectional Study Examining the Correlation Between Nocturnal Melatonin Level and Sleep Quality in Patients Admitted To the Cardiac Care Unit”. Open Access Macedonian Journal of Medical Sciences 6 (12):2342-47. https://doi.org/10.3889/oamjms.2018.451.