By Mandal AK   Nicholas A   Wrigley E   Hopkins RE   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|25|1|66-67

Informa Healthcare‎(2005)‎

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By Edi-Osagie E.C.O.   Hopkins R.E.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|72|1|105-106

Elsevier‎(1997)‎

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