KWARTENG OWUSU, S. An evaluation of spirometric reference equations for detecting ob- structive airway disease in South African children. African Journal of Thoracic and Critical Care Medicine, [S. l.], v. 31, n. 4, p. e4629, 2025. DOI: 10.7196/AJTCCM.2025.v31i4.4700. Disponível em: https://www.samajournals.co.za/index.php/ajtccm/article/view/4629. Acesso em: 24 apr. 2026.