[1] Univ Med Ctr Ljubljana, Univ Childrens Hosp, Dept Endocrinol Diabet & Metab Dis, Bohoriceva Ulica 20, SI-1000 Ljubljana, Slovenia
[2] Univ Ljubljana, Fac Med, Vrazov Trg 2, SI-1000 Ljubljana, Slovenia
[3] Udine Univ Hosp, Reg Coordinating Ctr Rare Dis, European Reference Network Hereditary Metab Dis M, Piazzale Santa Maria Misericordia 15, I-33100 Udine, Italy
[4] Univ Florence, Dept Expt & Clin Biomed Sci, I-50139 Florence, Italy
[5] Meyer Childrens Univ Hosp, Newborn Screening Clin Chem & Pharmacol Lab, I-50139 Florence, Italy
[6] Hosp Civils Lyon, Grp Hosp Est, Dept Biochem & Mol Biol, 59 Blvd Pinel, F-69677 Bron, France
[7] Heidelberg Univ Hosp, Ctr Child & Adolescent Med, Div Child Neurol & Metab Med, Neuenheimer Feld 430, D-69120 Heidelberg, Germany
[8] Karolinska Univ Hosp, Ctr Inherited Metab Dis, SE-17176 Stockholm, Sweden
[9] Karolinska Inst, Dept Mol Med & Surg, SE-17176 Stockholm, Sweden
[10] Charles Univ Prague, Dept Pediat & Inherited Metab Disorders, Fac Med 1, Prague 12808, Czech Republic
[11] Gen Univ Hosp Prague, Ke Karlovu 2, Prague 12808, Czech Republic
[12] EURORDIS Rare Dis Europe, F-75014 Paris, France
[13] Leiden Univ, Willem Alexander Childrens Hosp, Dept Pediat, Lab Pediat Immunol,Med Ctr, Albinusdreef 2, NL-2333 ZA Leiden, Netherlands
[14] Natl Inst Publ Hlth & Environm RIVM, Ctr Populat Res, NL-3720 BA Bilthoven, Netherlands
[15] Int Patient Org Primary Immunodeficiencies, Downderry PL11 3LY, Cornwall, England
[16] Off Int Soc Neonatal Screening, Reigerskamp 273, NL-3607 HP Maarssen, Netherlands
[17] Sheffield Childrens NHS Fdn Trust, Sheffield S10 2TH, S Yorkshire, England