Nasution, Fachrul Ahyar, Mustafa M. Amin, and Elmeida Effendy. 2022. “Factors Associated With Smartphone Addiction During COVID-19 Pandemic Lockdown in Students of Faculty of Medicine in North Sumatera”. Open Access Macedonian Journal of Medical Sciences 10 (T7):59-62. https://doi.org/10.3889/oamjms.2022.9257.