Fertil Steril 2010 Sep 25;94(4):1560-1563. Epub 2010 Jan 25.
Department of Obstetrics and Gynecology, University of Tartu, Tartu, Estonia; Department of Biotechnology, Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia; Nova Vita Clinic, Center for Infertility Treatment and Medical Genetics, Viimsi, Estonia.