1. Yale University School of Nursing, Orange, Connecticut, USA
2. Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut, USA
3. Department of Internal Medicine (Pulmonary, Critical Care, and Sleep Medicine), Yale School of Medicine, New Haven, Connecticut, USA
4. Department of Internal Medicine (Cardiovascular Medicine), Yale School of Medicine, New Haven, Connecticut, USA
5. Department of Health Policy and Administration, The Pennsylvania State University, University Park, Pennsylvania, USA