By Mcauliffe F   Bhal P S   Richards C J   Evans A S   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|17|2|161-162

Informa Healthcare‎(1997)‎

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By Das S. S.   Richards C. J.   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|20|3|308-309

Informa Healthcare‎(2000)‎

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