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ISSN:0301-2115|75|2|155-159

Elsevier‎(1997)‎

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By Hall D.R.   Odendaal H.J.   Steyn D.W.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|96|2|168-172

Elsevier‎(2001)‎

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By van Schie D.L.   de Jeu R.M.   Steyn D.W.   Odendaal H.J.   van Geijn H.P.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|102|2|161-166

Elsevier‎(2002)‎

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