WONG, M L. What is the cause of this patient’s chronic productive cough?. African Journal of Thoracic and Critical Care Medicine, [S. l.], v. 28, n. 3, p. 137, 2022. Disponível em: https://samajournals.co.za/index.php/ajtccm/article/view/239. Acesso em: 2 oct. 2025.