1. Institute of Primate Research; Reproductive health and Biology; POBox 24481-00502 Karen Nairobi Kenya
2. University of Nairobi; Department of Biochemistry; Nairobi Kenya
3. Medical School, National and Kapodistrian University of Athens; Assisted Reproduction Unit, 3rd Department of Obstetrics and Gynaecology; Attikon University Hospital Rimini 1 Athens Chaidari Greece 12462
4. University of Athens; 3rd Department of Obstetrics and Gynecology; 'Attikon' Hospital, Chaidari Athens Greece