1. Department of Biochemistry and Molecular Medicine; Université de Montréal; Montreal Quebec Canada
2. Research Center, CHU Sainte-Justine; Université de Montréal; Montreal Quebec Canada
3. Hospital Universitário Alcides Carneiro-HUAC; Federal University of Campina Grande; Campina Grande Paraiba Brazil
4. Department of Genetics, UFRGS; Medical Genetics Service, Hospital de Clínicas de Porto Alegre-HCPA, and Brazilian National Institute of Population Medical Genetics-INAGEMP; Porto Alegre Brazil
5. Department of Pediatric Genetics; Marmara University Hospital; Istanbul Turkey
6. Jonah's Just Begun-Foundation to Cure Sanfilippo Inc; Brooklyn New York USA
7. Medical Genetics Center of Genome; Isfahan Islamic Republic of Iran
8. Biochemical Genetics Unit; Institute of Medical Genetics Jacinto Magalhães, Centro Hospitalar do Porto; Porto Portugal
9. Department of Pathology and Laboratry Medicine, Children's Hospital of Eastern Ontario; Ottawa Canada