Lubis, A. et al. 2020. The Effectiveness of Cholecalciferol Addition at Improving Psychosis Symptoms in Amphetamine-Type Stimulant (ATS) Users. Pakistan Journal of Nutrition. 19, 2 (Jan. 2020), 44–50. DOI:https://doi.org/10.3923/pjn.2020.44.50.