1. Qatar Biomedical Research Institute, Medical Genetics Center, Doha, Qatar
2. Clinical & Metabolic Genetics, Hamad Medical Corporation, Doha, Qatar
3. Weill Cornell Medical College, Doha, Qatar
4. Shafallah Medical Genetics Center, Doha, Qatar
5. Pediatrics, University of Iowa, Iowa City, IA, USA
6. Genetics, Yale University School of Medicine, New Haven, CT, USA