1. Shilpi Pandey, Assisted Reproduction Unit, Aberdeen Maternity Hospital, Foresterhill, Aberdeen AB25 2ZD, UK, Tel.: +44 1224 553582, Fax: +44 1224 559948,
2. Siladitya Bhattacharya, Section of Applied Clinical Sciences, Division of Applied Health Sciences, School of Medicine & Dentistry, University of Aberdeen, Aberdeen Maternity Hospital, Foresterhill, Aberdeen, AB25 2ZD, UK, Tel.: +44 1224 550590, Fax: +44 1224 559948,