Pulmonology is the official journal of the Portuguese Society of Pulmonology (Sociedade Portuguesa de Pneumologia/SPP). The journal publishes 6 issues per year, mainly about respiratory system diseases in adults and clinical research. This work can range from peer-reviewed original articles to review articles, editorials, and opinion articles. The journal is printed in English, and is freely available in its web page as well as in Medline and other databases.