Regulatory T-Cell Distribution within Lung Compartments in COPD - Sales, Davi Simões; Ito, Juliana T; Zancheta, Ivy A; Annoni, Raquel; Aun, Marcelo V; Ferraz, Luiz Fernando S; Cervilha, Daniela A. B; Negri, Elnara; Mauad, Thais; Martins, Milton Arruda; Lopes, Fernanda Degobbi Tenorio Quirino dos Santos (Copd-journal of chronic obstructive pulmonary disease, 2017)