Ford, E. S., Mannino, D. M., Wheaton, A. G., Presley-Cantrell, L., Liu, Y., Giles, W. H., & Croft, J. B. (2014). Trends in the Use, Sociodemographic Correlates, and Undertreatment of Prescription Medications for Chronic Obstructive Pulmonary Disease among Adults with Chronic Obstructive Pulmonary Disease in the United States from 1999 to 2010. Public Library of Science.

Ford, Earl S., David M. Mannino, Anne G. Wheaton, Letitia Presley-Cantrell, Yong Liu, Wayne H. Giles, και Janet B. Croft. Trends in the Use, Sociodemographic Correlates, and Undertreatment of Prescription Medications for Chronic Obstructive Pulmonary Disease Among Adults With Chronic Obstructive Pulmonary Disease in the United States From 1999 to 2010. Public Library of Science, 2014.

Ford, Earl S., et al. Trends in the Use, Sociodemographic Correlates, and Undertreatment of Prescription Medications for Chronic Obstructive Pulmonary Disease Among Adults With Chronic Obstructive Pulmonary Disease in the United States From 1999 to 2010. Public Library of Science, 2014.