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MLA Citation
Lydia Feinstein et al.. “Validation of Questionnaire-based Case Definitions for Chronic Obstructive Pulmonary Disease.” Epidemiology, vol. 31, no. 3, 2020, p. . http://access.bl.uk/ark:/81055/vdc_100141224952.0x00002f
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Lydia Feinstein et al.. “Validation of Questionnaire-based Case Definitions for Chronic Obstructive Pulmonary Disease.” Epidemiology, vol. 31, no. 3, 2020, p. . http://access.bl.uk/ark:/81055/vdc_100141224952.0x00002f