Pulmonary function tests and respiratory symptoms among smokers in the city of mashhad (north east of Iran)

Pulmonary function tests and respiratory symptoms among smokers in the city of mashhad (north east of Iran)

Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Revista Portuguesa de Pneumologia (English Edition) - Volume 17, Issue 5, September–October 2011, Pages 199-204