1. Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada;
2. Addenbrooke’s Hospital, Cambridge, United Kingdom;
3. Intermountain Medical Center, Murray, UT;
4. Department of Medicine, Harvard Medical School, Boston, MA;
5. Department of Internal Medicine, University of Iowa, Iowa City, IA;
6. Lombardi Comprehensive Care Center, Georgetown University, Washington, DC;
7. Department of Medicine, University of North Carolina, Chapel Hill, NC; and
8. Hurley Medical Center, Flint, MI