1. Simpson College, Department of Mathematics Indianola Iowa USA
2. Charlotte North Carolina USA
3. Biostatistics Center Massachusetts General Hospital Boston Massachusetts USA
4. Nutrition Faculty Autonomous University of Sinaloa Culiacan Sinaloa Mexico
5. Down Syndrome Program, Division of Medical Genetics and Metabolism, Department of Pediatrics Harvard Medical School Boston Massachusetts USA
6. Department of Pediatrics Harvard Medical School Boston Massachusetts USA