- Correspondence to Xu-Dong Zhang, International Centre for Reproductive Health, Ghent University, De Pintelaan 185, P3 B-9000, Ghent 650500, Belgium;
- Received June 4, 2012
- Revised October 10, 2012
- Accepted November 3, 2012
- First published December 8, 2012.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.