1. Division of Cardiology; Department of Medicine; University College Hospital; Ibadan Nigeria
2. Soweto Cardiovascular Research Unit; Faculty of Health Sciences; University of the Witwatersrand; Parktown Johannesburg South Africa
3. Department of Medicine; Faculty of Health Sciences; Hatter Institute for Cardiovascular Research in Africa & IIDMM; University of Cape Town; Cape Town South Africa
4. Department of Epidemiology and Medical Statistics; College of Medicine; University of Ibadan; Ibadan Nigeria
5. Mary MacKillop Institute for Health Research/NHMRC CRE to Reduce Inequality in Heart Disease; Australian Catholic University; Melbourne Victoria Australia