2 Pasteur Institute of Bangui, Bangui, Central African Republic; University of Bangui, Bangui, Central African Republic.
3 National Malaria Programme, Ministry of Health and Population, Bangui, Central African Republic.
4 Pasteur Institute of Bangui, Bangui, Central African Republic; Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon; Homegrown Solutions for Health, Yaoundé, Cameroon. Electronic address: yap.boum2@pasteur-bangui.cf.