1 Department of Pediatric and Adolescent Medicine, Western Michigan University Homer Stryker MD School of Medicine, 1000 Oakland Drive, D48G, Kalamazoo, MI 49008-1284,United States, E-mail:Donald.greydanus@med.wmich.edu.
2 Medical Director, Health Services, Division for Intellectual and Developmental Disabilities, Ministry of Social Affairs and Social Services, P.O. Box 1260, IL-91012 Jerusalem, Israel, E-mail:jmerrick@zahav.net.il.