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Wheaton, Anne G., Earl S. Ford, William W. Thompson, Kurt J. Greenlund, Letitia R. Presley-Cantrell, und Janet B. Croft. Pulmonary Function, Chronic Respiratory Symptoms, and Health-related Quality of Life Among Adults in the United States – National Health and Nutrition Examination Survey 2007–2010. BioMed Central, 2013.

Wheaton, Anne G., et al. Pulmonary Function, Chronic Respiratory Symptoms, and Health-related Quality of Life Among Adults in the United States – National Health and Nutrition Examination Survey 2007–2010. BioMed Central, 2013.