by Goh, H.H.V., Ratnam, S.S.
Published in Maturitas (1997)

by Ng, S C, Ratnam, S S, Law, H Y, Edirisinghe, W R, Chia, C M, Rauff, M, Wong, P C, Yeoh, S C, Anandakumar, C, Goh, H H
Published in Asia-Oceania journal of obstetrics and gynaecology (01.12.1985)