[1] Queen Mary Univ London, William Harvey Res Inst, Barts & London Sch Med & Dent, Ctr Endocrinol, London, England
[2] KULeuven, LIPIT, Leuven, Belgium
[3] UCL, Dept Genet & Genom Med, Inst Child Hlth, London, England
[4] Hosp Ninos Dr Ricardo Gutierrez, Serv Nefrol, Buenos Aires, DF, Argentina
[5] Hosp Ninos Dr Ricardo Gutierrez, Ctr Invest Endocrinol, CEDIE, Dr Cesar Bergada,CONICET,FEI,Div Endocrinol, Buenos Aires, DF, Argentina
[6] Alder Hey Childrens Hosp, Dept Paediat Endocrinol, Liverpool, Merseyside, England
[7] Birmingham Childrens Hosp, Dept Paediat Endocrinol, Birmingham, W Midlands, England
[8] Bristol Royal Hosp Children, Bristol Childrens Renal Unit, Bristol, Avon, England
[9] Hlth Sci Univ, Suleymaniye Matern & Childrens Training & Res Hos, Dept Pediat Endocrinol & Diabet, Istanbul, Turkey
[10] Gulhane Mil Med Acad, Dept Pediat Endocrinol & Diabet, Ankara, Turkey
[11] Marmara Univ, Dept Pediat Endocrinol & Diabet, Pend Educ & Res Hosp, Istanbul, Turkey
[12] Aga Khan Univ Hosp, Dept Med, Sect Endocrinol, Karachi, Pakistan