1. Division of Pulmonary Diseases and Critical Care Medicine, Yale-New Haven Health Bridgeport Hospital, Bridgeport, Connecticut, USA.
2. Division of Cardiovascular Medicine, The University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
3. Division of Cardiology, University of Nevada Las Vegas, Las Vegas, Nevada, USA.
4. Division of Hospital Medicine, Lovelace Medical Center, Albuquerque, New Mexico, USA.