1 Global Health Institute, University of Antwerp, Antwerp 2610, Belgium. Electronic address: robert.colebunders@uantwerpen.be.
2 Division of Allergy and Infectious Diseases, University of Washington, Seattle, WA, USA.
3 Department of Biomedical Science, University of Antwerp, Antwerp 2610, Belgium; Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
4 Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.