Laboratory	Test Method	Prenatal	Carrier *
Baylor Research Institute, Institute of Metabolic Disease - Dallas, TX, USA	• Analyte
Denver Genetic Laboratories, UCD Biochemical Genetics Laboratory - Aurora, CO, USA	• Analyte
VU University Medical Center, Metabolic Unit - Amsterdam, Netherlands	• Sequence analysis of the entire coding region • Analyte • Enzyme assay • Deletion/duplication analysis

^* Carrier column is relevant to autosomal recessive and X-linked inheritance; column will be blank when it is not relevant (e.g. autosomal dominant inheritance, microdeletions/duplications) and/or is not offered by the lab.