Affiliation: | Department of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden; Human Genomic Diversity and Disease Research Unit, Division of Human Genetics, University of the Witwatersrand and National Health Laboratory Services. PO Box 1038, Johannesburg, 2000, South Africa; Department of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden |