Early management of COPD: where are we now and where do we go from here? A Delphi consensus project oleh Di Marco F, Balbo P, de Blasio F, Cardaci V, Crimi N, Girbino G, Pelaia G, Pirina P, Roversi P, Santus P, Scichilone N, Vatrella A, Pasqualetti P, Carone M