Evolutionary Medicine Laboratory, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa. andrew.ndhlovu@students.wits.ac.za.|School of Electrical and Information Engineering, University of the Witwatersrand, Johannesburg, South Africa. scott.hazelhurst@wits.ac.za.|Evolutionary Medicine Laboratory, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa. pierre.durand@wits.ac.za.