1 University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa; Hannover Medical School, Department of Cardiology and Angiology, Hannover, Germany.
2 University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa; University of Cape Town, Division of Cardiology, Cape Town, South Africa.
3 University of Cape Town, Division of Cardiology, Cape Town, South Africa.
4 University of Cape Town, Department of Medicine, Cape Town, South Africa.
5 University of Cape Town, Hatter Institute for Cardiovascular Research in Africa, Cape Town, South Africa. Electronic address: [email protected].