1. Unit of Medical Genetics Department of Pediatrics Faculty of Medicine University of the Andes Merida Venezuela
2. Medical Genetics Laboratory Bambino Gesù Children Hospital and Research Institute Rome Italy
3. Dermatology Unit Bambino Gesù Children's HospitalIRCCS Rome Italy
4. Biomedical Sciences Research InstituteUlster University Northern Ireland UK
5. Department of Medical Genetics and Rare Diseases Bambino Gesù Children Hospital and Research Institute Rome Italy
6. Unit of Dentistry Bambino Gesù Children Hospital and Research Institute Rome Italy