1. Division of Pulmonary Diseases and Critical Care Medicine, Yale–New Haven Health Bridgeport Hospital, 267 Grant Street, Bridgeport, CT 06610, USA
2. Division of Hematology and Oncology, Oakland University–William Beaumont School of Medicine, Royal Oak, MI, USA
3. Department of Internal Medicine, Yale–New Haven Health Bridgeport Hospital, Bridgeport, CT, USA
4. Division of Pulmonary Diseases and Critical Care Medicine, Yale–New Haven Health Bridgeport Hospital, Bridgeport, CT, USA
5. Department of Internal Medicine, Banner University Medical Center, Tucson, AZ, USA