[1] Vrije Univ Brussels, Acad Ziekenhuis, Ctr Reprod Med, Brussels, Belgium
[2] Vrije Univ Brussels, Acad Ziekenhuis, Follicle Biol Lab, Brussels, Belgium
[3] Rigshosp, Fertil Clin, DK-2100 Copenhagen, Denmark
[4] Ferring Pharmaceut AS, Clin Res & Dev, Copenhagen, Denmark