1. MRC Centre for Reproductive Health, The University of Edinburgh, The Queen’s Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, Scotland, UK.
2. Edinburgh Royal Hospital for Sick Children, 9 Sciennes Road, Edinburgh EH9 1LF, Scotland, UK.
3. Edinburgh CRF Mass Spectrometry Core, Centre for Cardiovascular Science, The University of Edinburgh, The Queen’s Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, Scotland, UK.
4. University Department of Growth and Reproduction, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark.