1 Duke Clinical Research Institute, Duke Global Health Institute, Department of Medicine, Duke University, 2400 Pratt Street, Durham, NC 27705, USA. Electronic address: [email protected].
2 Division of Cardiology, Department of Medicine, University of California, 505 Parnassus Avenue, 11th Floor, Room 1180D, San Francisco, CA 94143, USA. Electronic address: [email protected].