1. Master of Science in Human Genetics Program, Department of Morphology Universidad Nacional de Colombia Cundinamarca Colombia
2. Ophthalmic Genetics and Visual Function Branch National Eye Institute, National Institutes of Health Bethesda Maryland USA
3. Division of Human Genetics Cincinnati Children's Hospital Medical Center Cincinnati Ohio USA
4. Fundación Cardiovascular de Colombia Bucaramanga Colombia
5. Department of Pediatrics University of Cincinnati College of Medicine Cincinnati Ohio USA