1 Department of Internal Medicine, The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL; Lung Health Center, University of Alabama at Birmingham, Birmingham, AL; Acute Care Service, Birmingham VA Medical Center, Birmingham, AL. Electronic address: rcwade@uabmc.edu.
2 Department of Internal Medicine, The University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL; Lung Health Center, University of Alabama at Birmingham, Birmingham, AL; Acute Care Service, Birmingham VA Medical Center, Birmingham, AL.