Sleep quality among undergraduate medical students at a South African university: a cross-sectional study. Undergraduate Research in Health Journal, [S. l.], v. 3, n. 1, p. e2475, 2025. DOI: 10.1796/. Disponível em: https://samajournals.co.za/index.php/urhj/article/view/2475. Acesso em: 7 oct. 2025.