Application of the Beck Depression Inventory – II, Zung Self-Rating Anxiety Scale và Pittsburgh Sleep Quality Index on student of School of Medicine – Vietnam National University Ho Chi Minh City: a pilot study - Nguyễn, Ân; Nguyen, Ngoc; Bui, Minh; Le, My; Vo, Nghia; Hoang, Ngoc; Chung, Nha; Nguyen, Dung (VNUHCM Journal of Health Sciences, 2021)