Issue 1 - ¿Update on adverse respiratory effects of outdoor air pollution¿. Part 1): Outdoor air pollution and respiratory diseases: A general update and an Italian perspective S. De Matteis; F. Forastiere; S. Baldacci; S. Maio; S. Tagliaferro; S. Fasola; G. Cilluffo; S. La Grutta; G. Viegi;

Issue 2 - ¿Update on adverse respiratory effects of indoor air pollution¿ Part 1): Indoor air pollution and respiratory diseases: A general update and a Portuguese perspective J.C. Rufo; I. Annesi-Maesano; P. Carreiro-Martins; A. Moreira; A.C. Sousa; M.R. Pastorinho; N. Neuparth; L. Taborda-Barata;

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;