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ISSN:1460-2350|14|1|198-206

Oxford University Press‎(1999)‎

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By Greb RR   Lettmann N   Sonntag B   Schüring AN   von Otte S   Kiesel L   in Reproductive BioMedicine Online

ISSN:1472-6483|9|3|271-278

Reproductive Healthcare Ltd‎(2004)‎

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