1. Adams PF, Hendershot GE, Marano MA (1999) Current estimates from the National Health Interview Survey, 1996. Vital Health Stat vol 10. US Department of Health and Human Services, Hyattsville, Maryland
2. Blanc PD et al (2019) The occupational burden of nonmalignant respiratory diseases. An official american thoracic society and european respiratory society statement. Am J Respir Crit Care Med 199(11):1312–1334. https://doi.org/10.1164/rccm.201904-0717ST
3. CDC (2012) Chronic obstructive pulmonary disease among adults–United States, 2011. MMWR Morb Mortal Wkly Rep 61(46):938–943
4. CDC (1994) Plan and Operation of the Third National Health and Nutrition Examination Survey, 1988–94. Vital Health Stat vol 1. US Department of Health and Human Services, Hyattsville, MD
5. CDC (2011) National Health and Nutrition Examination Survey: Respiratory Health Spirometry Procedures Manual. US Department of Health and Human Services, Hyattsville, MD