[1] Univ Cambridge, Addenbrookes Hosp, Dept Med, Cambridge CB2 2QQ, England
[2] Univ Cambridge, Dept Med, Addenbrookes NHS Fdn Hosp Trust, Cambridge CB2 2QQ, England
[3] Univ Amsterdam, Acad Med Ctr, Dept Med Biochem, NL-1105 AZ Amsterdam, Netherlands
[4] Assistance Publ Hop Paris, Hop Beaujon, Dept Internal Med, Paris, France
[5] IRCCS, Policlinc Fdn, Dept Internal Med, Milan, Italy
[6] St Franziskus Hosp, Dept Internal Med, Cologne, Germany
[7] Univ WA, King Edward Mem Hosp Women, Sch Peadiat & Child Hlth, Genet Serv Western Australia, Perth, WA, Australia
[8] Cincinnati Childrens Hosp Med Ctr, Div Human Genet, Cincinnati, OH USA
[9] Univ Amsterdam, Acad Med Ctr, Div Endocrinol & Metab, Dept Internal Med, NL-1105 AZ Amsterdam, Netherlands
[10] Natl Taiwan Univ Hosp, Dept Pediat & Med Genet, Taipei, Taiwan
[11] Univ Amsterdam, Acad Med Ctr, Dept Radiol, NL-1105 AZ Amsterdam, Netherlands
[12] Univ Fed Sao Paulo, Reference Ctr Inborn Errors Metab, Sao Paulo, Brazil
[13] Yale Univ, Sch Med, New Haven, CT USA
[14] NYU, Sch Med, Dept Neurol & Pediat, New York, NY USA
[15] Childrens Mem Hlth Inst, Dept Metab Dis, Warsaw, Poland
[16] Genzyme Corp, Cambridge, MA USA
[17] Univ Res Fdn Lysosomal Storage Dis, Coral Springs, FL USA
[18] NW Oncol Hematol Associates PA, Coral Springs, FL USA