[1] UCL, Great Ormond St Inst Child Hlth, London, England
[2] Great Ormond St Hosp Sick Children, London, England
[3] Great Ormond St Biomed Res Ctr, Natl Inst Hlth Res, London, England
[4] NHGRI, Metab Med Branch, NIH, Bethesda, MD USA
[5] Great Ormond St Biomed Res Ctr, Natl Inst Hlth Res, London WC1N 1EH, England