Clinical networks for ILD: casting light on diffuse lung shadows.

from the Obstructive Lung Disease in Northern Sweden Studies. Respir Med 2003;97:115e22. 3. Mannino DM, Buist AS, Petty TL, et al. Lung function and mortality in the United States: data from the first National Health and Nutrition Examination Survey follow up study. Thorax 2003;58:388e93. 4. Shahab L, Jarvis MJ, Britton J, et al. Prevalence, diagnosis and relation to tobacco dependence of chronic obstructive pulmonary disease in a nationally representative population sample. Thorax 2006;62:1043e47. 5. Torres-Duque C, Maldonado D, Pérez-Padilla R, et al. Forum of International Respiratory Studies (FIRS) Task Force on Health Effects of Biomass Exposure. Biomass fuels and respiratory diseases: a review of the evidence. Proc Am Thorac Soc 2008;5:577e90. 6. Blanc PD, Iribarren C, Trupin L, et al. Occupational exposures and the risk of COPD: dusty trades revisited. Thorax 2009;64:6e12. 7. Salvi SS, Barnes PJ. Chronic obstructive pulmonary disease in non-smokers. Lancet 2009;374: 733e43. 8. Hardie JA, Buist AS, Vollmer WM, et al. Risk of over-diagnosing COPD in asymptomatic never-smokers. Eur Respir J 2002;20: 1117e22. 9. Schermer TR, Smeele IJ, Thoonen BP, et al. Current clinical guideline definitions of airflow obstruction and COPD overdiagnosis in primary care. Eur Respir J 2008;32:945e52.