1 Duke Global Health Institute (DGHI), Duke University, 184 Durham, USA; Western Norway University of Applied Sciences, Bergen, 186 Norway. Electronic address: mike.landry@duke.edu.
2 Royal Free Hospital NHS Hospital, London, UK.
3 Department of Immunology, Duke University, Durham, USA.
4 Durham VA Health Care System, Durham, USA.
5 Department of Population Health Sciences, Duke University, Durham, USA.
6 HAN University of Applied Sciences, Nijmegen, Netherlands.