In this Article, the affiliation ‘South African National Bioinformatics Network, University of the Western Cape, Bellville, South Africa’, which is associated with authors Gordon Wells and Judit Kumuthini, should be ‘South African National Bioinformatics Institute, University of the Western Cape, Bellville, South Africa’. In addition, author Gordon Wells should be associated with an additional affiliation, ‘Africa Health Research Institute, Durban, South Africa’. In Fig. 1a, the circle representing the data for South Africa should be dark grey (indicating the AGVP data source) rather than light grey (indicating the 1000G data source). The Article has been corrected online.