References
- Anderson A. B. M. Epidemiology. Discussion. Preterm Labour, Proceedings of the Fifth Study Group of The Royal College of Obstetricians and Gynaecologists, A. Anderson, R. Beard, N. Brudenell, P. Dunn. Royal College of Obstetricians and Gynaecologists, London 1977; 48
- MRC/RCOG Working Party on Cervical Cerclage. Interim report of the Medical Research Council/Royal College of Obstetricians and Gynaecologists multicentre randomised trial of cervical cerclage. British Journal of Obstetrics and Gynaecology 1988; 95: 437–445