van Zyl-Smit Roal, Firth Jean C, Duffield Maureen, Marais A David
Department of Medicine, University of Cape Town, J45-47 OMB, Groote Schuur Hospital Observatory, Cape Town 7935, South Africa.
Nephrol Dial Transplant. 2004 Dec;19(12):3176-9. doi: 10.1093/ndt/gfh474.