Thiotropine slightly reduces exacerbations of COPD. Portuguese Journal of Family Medicine and General Practice, [S. l.], v. 22, n. 2, p. 265, 2006. DOI: 10.32385/rpmgf.v22i2.10238. Disponível em: https://rpmgf.pt/ojs/index.php/rpmgf/article/view/10238. Acesso em: 19 apr. 2026.