1. Department of Mechanical, Electronic and Chemical Engineering, Faculty of Technology, Art and Design Oslo Metropolitan University Oslo Norway
2. National Unit for Screening and Diagnosis of Congenital Pediatric Metabolic Disorders, Department of Medical Biochemistry Oslo University Hospital, Rikshospitalet Oslo Norway
3. Chief City Medical Officer, City of Kristiansand Kristiansand Norway
4. Department of Medical Biochemistry Oslo University Hospital, Rikshospitalet Oslo Norway