VAN DEN BERG, A J. Validation of Proposed Criteria for Progressive Pulmonary Fibrosis. African Journal of Thoracic and Critical Care Medicine, [S. l.], v. 29, n. 1, p. 30, 2023. Disponível em: https://samajournals.co.za/index.php/ajtccm/article/view/954. Acesso em: 18 apr. 2026.