Kurth, L.; Hnizdo, E. Change in Prevalence of Restrictive Lung Impairment in the U.S. Population and Associated Risk Factors: The National Health and Nutrition Examination Survey (NHANES) 1988–1994 and 2007–2010. Multidiscip Respir Med 2015, 10 (1). https://doi.org/10.4081/mrm.2015.281.