Correlation of Hospital Anxiety and Depression Scale (HADS) and Six Minute Walk Test (6MWT) Performance in Chronic Obstructive Pulmonary Disease (COPD) Patients. International Journal of Biomedical Research, [S. l.], v. 11, n. 6, p. e5419, 2020. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/5419. Acesso em: 29 mar. 2026.