1 Pulmonary, Allergy, Sleep and Critical Care Medicine Section, Department of Medicine, VA Boston Healthcare System and Harvard Medical School, West Roxbury, MA; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA. Electronic address: eric.garshick@va.gov.
2 Occupational and Environmental Medicine, San Francisco VA Health Care System, San Francisco, CA; Department of Medicine, University of California San Francisco School of Medicine, San Francisco, CA.