Institutional Review Board Statement
The study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of Colorado State University (protocol ID: 19-9219H; date of approval: 30 August 2019), Johns Hopkins University (protocol ID: NA_00048461/CR00024365; date of approval: 22 January 2019), and the University of the Witwatersrand (protocol ID: M110741; date of approval: 19 October 2012).