1. University of the Witwatersrand, University of Fort Hare, Eastern Cape Department of Health; Department of Obstetrics and Gynaecology, East London Hospital Complex; Frere and Cecilia Makiwane Hospitals Private Bag X 9047 East London Eastern Cape South Africa 5200
2. Royal United Hospital; Cochrane Gynaecological Cancer Group; Education Centre Bath UK BA13NG
3. Centro de Estudos de Medicina Baseada em Evidências e Avaliação Tecnológica em Saúde; Brazilian Cochrane Centre; R. Borges Lagoa, 564 cj 63 Vila Clementino São Paulo São Paulo Brazil 04038000
4. Nottingham Health Science Partners; Nottingham Clinical Trials Unit; C Floor, South Block Queen's Medical Centre Nottingham UK NG7 2UH