[1] Univ Cape Town, Groote Schuur Hosp, Dept Anaesthesia & Perioperat Med, Cape Town, South Africa
[2] Univ Cape Town, Fac Hlth Sci, Cape Town, South Africa
[3] Univ Cape Town, Groote Schuur Hosp, Dept Orthopaed Surg, Cape Town, South Africa
[4] Univ KwaZulu Natal, Sch Clin Med, Dept Orthopaed Surg, Pietermaritzburg, South Africa
[5] Univ Stellenbosch, Tygerberg Med Sch, Dept Orthopaed Surg, Cape Town, South Africa
[6] Univ Free State, Dept Anaesthesia, Bloemfontein, South Africa
[7] Univ Free State, Dept Orthopaed Surg, Bloemfontein, South Africa
[8] Paarl Prov Hosp, Dept Physiotherapy, Paarl, South Africa
[9] Paarl Prov Hosp, Dept Anaesthesia, Paarl, South Africa
[10] Paarl Prov Hosp, Dept Orthopaed, Paarl, South Africa
[11] Univ KwaZulu Natal, Inkosi Albert Luthuli Cent Hosp, Dept Orthopaed, Arthroplasty & Sports Med unit, Durban, South Africa
[12] Univ KwaZulu Natal, Inkosi Albert Luthuli Cent Hosp, Dept Anaesthesia, Durban, South Africa
[13] Greys Hosp, Dept Anaesthesia Crit Care & Pain Management, Pietermaritzburg, South Africa
[14] Greys Hosp, Dept Orthopaed Surg, Pietermaritzburg, South Africa
[15] Greys Hosp, Dept Anaesthesia, Greys Pain Clin, Pietermaritzburg, South Africa
[16] Greys Hosp, Dept Physiotherapy, Pietermaritzburg, South Africa
[17] Univ Pretoria, Steve Biko Acad Hosp, Dept Orthopaed Surg, Pretoria, South Africa
[18] Univ Pretoria, Steve Biko Acad Hosp, Dept Anaesthesia, Pretoria, South Africa
[19] Univ Cape Town, Groote Schuur Hosp, Dept Physiotherapy, Cape Town, South Africa
[20] Worcester Hosp, Dept Anaesthesia, Worcester, South Africa
[21] Worcester Hosp, Dept Orthopaed Surg, Worcester, South Africa
[22] New Somerset Hosp, Dept Physiotherapy, Cape Town, South Africa
[23] New Somerset Hosp, Dept Orthopaed, Cape Town, South Africa
[24] Christiaan Barnard Mem Hosp, Cape Town, South Africa
[25] New Somerset Hosp, Dept Anaesthesia, Cape Town, South Africa
[26] Victoria Hosp, Dept Orthopaed Surg, Cape Town, South Africa
[27] Victoria Hosp, Dept Anaesthesia, Cape Town, South Africa
[28] Victoria Hosp, Dept Physiotherapy, Cape Town, South Africa
[29] Univ Stellenbosch, Tygerberg Acad Hosp, Dept Anaesthesiol & Crit Care, Cape Town, South Africa