Multidisciplinary Team Approach Is Key for Managing Pregnancy and Delivery in Patient with Rare, Complex MPS I -- Clinical Evolution After Enzyme Replacement Therapy in Twins with the Severe Form of Maroteaux–Lamy Syndrome -- A New Approach for Fast Metabolic Diagnostics in CMAMMA -- Pilot Experience with an External Quality Assurance Scheme for Acylcarnitines in Plasma/Serum -- ECHS1 Deficiency as a Cause of Severe Neonatal Lactic Acidosis -- Chronic Oral l-Carnitine Supplementation Drives Marked Plasma TMAO Elevations in Patients with Organic Acidemias Despite Dietary Meat Restrictions -- A Founder Effect for the HGD G360R Mutation in Italy: Implications for a Regional Screening of Alkaptonuria -- Missed Newborn Screening Case of Carnitine Palmitoyltransferase-II Deficiency -- Acute Metabolic Crises in Maple Syrup Urine Disease After Liver Transplantation from a Related Heterozygous Living Donor -- Identification of Cryptic Novel α-Galactosidase A Gene Mutations: Abnormal mRNA Splicing and Large Deletions -- Severe Neonatal Presentation of Mitochondrial Citrate Carrier (SLC25A1) Deficiency -- Biomarkers in a Taurine Trial for Succinic Semialdehyde Dehydrogenase Deficiency -- A Modified Enzymatic Method for Measurement of Glycogen Content in Glycogen Storage Disease Type IV -- The Effect of Multiple Sulfatase Deficiency (MSD) on Dental Development: Can We Use the Teeth as an Early Diagnostic Tool? -- Novel Report of Phosphoserine Phosphatase Deficiency in an Adult with Myeloneuropathy and Limb Contractures -- Erratum to: Novel Report of Phosphoserine Phosphatase Deficiency in an Adult with Myeloneuropathy and Limb Contractures.