1 Vanderbilt University School of Medicine, Nashville, TN. Electronic address: [email protected].
2 University of Namibia School of Medicine, Windhoek, Namibia.
3 Copperbelt University Medical School, Ndola, Zambia.
4 Faculty of Health Sciences, Lurio University, Nampula, Mozambique.
5 Department of Medical Microbiology and Immunology, Center for Biomedicine, University of Oulu, Medical Research Center Oulu, Oulu University Hospital and University of Oulu; Nordlab Oulu, and Oulu University Hospital, Oulu, Finland.
6 School of Medicine, Department of Internal Medicine, University of Namibia, Windhoek, Namibia.