1. Department of Medicine, University of California, Irvine, Irvine, CA, USA
2. Department of Pulmonary and Cardiac Rehabilitation, J. Paul Sticht Center on Aging and Rehabilitation, Wake Forest Baptist Health, Medical Center Boulevard, Winston Salem, NC, USA
3. Wingate University School of Pharmacy, and Atrium Health, Carolinas Medical Center Main, Charlotte, NC, USA
4. Section of Pulmonary and Critical Care Medicine, Baylor College of Medicine, Houston, TX, USA