[1] Rigshosp, Univ Dept Growth & Reprod, DK-2100 Copenhagen, Denmark
[2] Natl Childrens Hosp, Dept Pediat, Dublin, Ireland
[3] Addenbrookes Hosp, Dept Pediat, Cambridge, England
[4] Birmingham Childrens Hosp, Birmingham, W Midlands, England
[5] Royal Hosp Sick Children, Dept Child Hlth, Glasgow G3 8SJ, Lanark, Scotland
[6] Lund Univ, Univ Gen Hosp, Dept Pediat, Lund, Sweden
[7] Karolinska Hosp & Inst, Pediat Endocrinol Unit, Stockholm, Sweden