Ethical Issues
Image acquisition and authorization to use them for research and teaching purposes were obtained from the Cantonal Ethics Board of Geneva, Switzerland (CCER, No. 2017-0110), and the Cameroonian National Ethics Committee for Human Health Research (No. 2018/07/1083/CE/CNERSH/SP). The protocol of the 3T study (the large prospective trial in which this study is nested), was registered under ClinicalTrials.gov (identifier: 