1 Department of Medicine, F. Edward Hebert School of Medicine at the Uniformed Services University of the Health Sciences, Bethesda, MD. Electronic address: lisa.moores@usuhs.edu.
2 Department of General Internal Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
3 Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, ON, Canada.