Prevalence of pulmonary hypertension in COPD patients living at high altitude C. Aguirre-Franco; CA. Torres-Duque; G. Salazar; A. Casas; C. Jaramillo; M. Gonzalez-Garcia;

Single breath nitrogen test as predictor of lung function decline and COPD over an 8-year follow-up F. Pistelli; D.L. Sherrill; F. Di Pede; S. Baldacci; M. Simoni; S. Maio; L. Carrozzi; G. Viegi;

Chronic obstructive pulmonary disease exacerbations' management in Portuguese hospitals ¿ EvaluateCOPDpt, a multicentre, observational, prospective study J. Moita; U. Brito; C. Rodrigues; L. Ferreira; J.R. Vieira; A. Catarino; A. Morais; V. Hespanhol; C.R. Cordeiro;