1. Biochemical Sciences, Synnovis, Guys & St Thomas’ NHSFT, London SE1 7EH, UK
2. GKT School of Medical Education, Kings College London, London WC2R 2LS, UK
3. Department of Metabolic Medicine, Great Ormond Street Hospital NHSFT, London WC1N 3JH, UK
4. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
5. Biochemical Genetics Unit, Cambridge University Hospitals NHSFT, Cambridge CB2 0QQ, UK
6. Portsmouth Hospitals Trust, Portsmouth PO6 3LY, UK
7. Department of Medical Biochemistry, Immunology & Toxicology, University Hospital Wales, Cardiff CF14 4XW, UK
8. School of Medicine, Cardiff University, Cardiff CF14 4XN, UK
9. South West Thames Newborn Screening, Epsom & St Helier Hospitals, Carshalton SM5 1AA, UK
10. Clinical Chemistry, Sheffield Children’s NHSFT, Sheffield S10 2TH, UK
11. Department of Clinical Biochemistry, Oxford University Hospitals NHSFT, Oxford OX3 9DU, UK
12. Willink Biochemical Genetics Laboratory, Genomic Medicine, Manchester University NHSFT, Manchester M13 9WL, UK
13. Great North Children’s Hospital, Newcastle Upon Tyne Hospitals NHSFT, Newcastle NE1 4LP, UK
14. Willink Biochemical Genetics Unit, Manchester University NHSFT, Manchester M13 9WL, UK
15. Department of Paediatric Metabolic Medicine, Evelina London Children’s Hospital, Guys & St Thomas’ NHSFT, London SE1 7EH, UK
16. University Hospitals Bristol and Weston NHSFT, Bristol BS1 3NU, UK
17. Paediatric Medicine, Sheffield Children’s NHSFT, Sheffield S10 2TH, UK
18. Birmingham Women’s and Children’s Hospital, Birmingham B4 6NH, UK