Mokete Lipalo, Robertson Anthony, Viljoen Denis, Beighton Peter
Orthopaedic Division, C.H. Baragwanath Hospital, University of the Witwatersrand, Old Potch Road, Johannesburg, South Africa.
J Orthop Sci. 2005 Nov;10(6):641-6. doi: 10.1007/s00776-005-0958-9.