Frostad A, Soyseth V, Haldorsen T, Andersen A, Gulsvik A. Respiratory symptoms and 30 year mortality from obstructive lung disease and pneumonia. Thorax 2006; 61(11):951-956.
Frostad A, Soyseth V, Haldorsen T, Andersen A, Gulsvik A. Respiratory symptoms and 30 year mortality from obstructive lung disease and pneumonia. Thorax 2006; 61(11):951-956.