| Furberg CD | Department of Medicine, One Medical Center Blvd, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. |
| Gartlehner G | Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. gartlehner@schsr.unc.edu |
| Lohr KN | Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. |
| Macintyre NR | Division of Pulmonary, Allergy, and Critical Care, Department of Medicine, Duke University Medical Center, Durham NC 27710, USA. |
| Phua GC | Division of Pulmonary, Allergy, and Critical Care, Department of Medicine, Duke University Medical Center, Durham NC 27710, USA. |
| Singh S | Department of Medicine, One Medical Center Blvd, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA. sosingh@wfubmc.edu |
| Varkey B | Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA. |
| Varkey JB | Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA. jay.varkey@duke.edu |