1. Child Study Center, Yale University, New Haven, Connecticut.
2. Department of Pediatrics, Yale University, New Haven, Connecticut.
3. Department of Psychology, Yale University, New Haven, Connecticut.
4. Department of Psychiatry, Yale University, New Haven, Connecticut.
5. University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
6. Department of Diagnostic Radiology, Yale University, New Haven, Connecticut.