[1] Univ Cape Town, Div Neurosurg, ZA-7925 Cape Town, South Africa
[2] Red Cross War Mem Childrens Hosp, Spina Bifida Clin, Cape Town, South Africa
[3] Univ Cape Town, Div Med Genet, ZA-7925 Cape Town, South Africa
[4] Univ Cape Town, Dept Obstet & Gynaecol, Cape Town, South Africa
[5] Groote Schuur Hosp, Fetal Med Unit, ZA-7925 Cape Town, South Africa
[6] Univ Cape Town, Div Urol, ZA-7925 Cape Town, South Africa
[7] Univ Cape Town, Div Dev Paediat, ZA-7925 Cape Town, South Africa
[8] Univ Cape Town, Div Orthopaed Surg, ZA-7925 Cape Town, South Africa