1 Chris Barnard Division of Cardiothoracic Surgery, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa. Electronic address: jacques.scherman@uct.ac.za.
2 Institute for Diagnostic and Interventional Radiology, University Hospital of Zurich, Zurich, Switzerland.
3 Chris Barnard Division of Cardiothoracic Surgery, Groote Schuur Hospital, University of Cape Town, Cape Town, South Africa.
4 Clinic for Cardiovascular Surgery, University Hospital of Zurich, Zurich, Switzerland.