1. Department of Pediatrics; Faculty of Medicine; Unit of Medical Genetics; University of The Andes; Mérida Venezuela
2. Area Diagnóstica; DNA Data; San Sebastian Spain
3. Unit of Oncology; Institute Autonomous Hospital University of The Andes; Mérida Venezuela
4. Department of Pediatrics; Faculty of Medicine; Service of Neuropediatrics; University of The Andes; Mérida Venezuela
5. Unit of Dermatology; Bambino Gesù Children's Hospital; IRCCS; Rome Italy
6. Research Laboratory; Bambino Gesù Children's Hospital - IRCCS; Rome Italy
7. Unit of Dentistry; Bambino Gesù Children's Hospital; IRCCS; Rome Italy