Affiliation: | 1. Baylor College of Medicine, Section of Pulmonary, Sleep, and Critical Care Medicine, USA;2. Department of Medicine and Cardiothoracic Surgery, Albert Einstein College of Medicine, Bronx, NY, USA;3. Northeast Ohio Medical University, Department of Family Medicine, USA;4. Michael E. DeBakey VA Medical Center, Section of Pulmonary, Sleep, and Critical Care Medicine, USA |