[1] Erasmus Univ, Med Ctr, Rotterdam, Netherlands
[2] Univ Childrens Hosp, Essen, Germany
[3] Med Univ & Gen Hosp Vienna, Vienna, Austria
[4] Sahlgrens Univ Hosp, Gothenburg, Sweden
[5] Univ Genoa, Ist Giannina Gaslini, Genoa, Italy
[6] Hosp Infantil Univ Nino Jesus, Madrid, Spain
[7] Univ Hosp Brussels, Brussels, Belgium
[8] Queen Elizabeth Hosp, Birmingham, W Midlands, England
[9] Cardiff Univ, Sch Med, Cardiff, S Glam, Wales
[10] Karolinska Inst, Dept Mol Med & Surg, Stockholm, Sweden
[11] Karolinska Univ Hosp, Dept Endocrinol Metab & Diabetol, Stockholm, Sweden
[12] Erciyes Univ, Sch Med, Dept Endocrinol, Kayseri, Turkey
[13] Carl von Ossietzky Univ Oldenburg, Klinikum Oldenburg, Dept Pediat, Med Campus, Oldenburg, Germany
[14] Univ Belgrade, Sch Med, Belgrade, Serbia
[15] Univ Bologna, Bologna, Italy
[16] Karolinska Inst, Dept Womens & Childrens Hlth, Stockholm, Sweden
[17] Karolinska Univ Hosp, Pediat Endocrinol Unit, Stockholm, Sweden
[18] Christie Hosp, Manchester, Lancs, England
[19] Univ Patras, Sch Med, Patras, Greece
[20] Hop Enfants, Toulouse, France