[1] Washington Univ, Sch Med, Dept Neurol, St Louis, MO 63110 USA
[2] Ctr Dis Control & Prevent, Natl Ctr Birth Defects & Dev Disabil, Atlanta, GA USA
[3] Univ Paris 12, Hop Henri Mondor, AP HP, Dept Dermatol, F-94010 Creteil, France
[4] Neurosci Ctr MGH E, Charlestown, MA USA
[5] Univ Toronto, Dept Neurosurg, Toronto, ON, Canada
[6] NCI, Radiat Epidemiol Branch, Div Canc Epidemiol & Genet, Bethesda, MD 20892 USA
[7] Univ Sydney, Dept Paediat & Child Hlth, Sydney, NSW 2006, Australia
[8] Family Federat Finland, Dept Med Genet, Helsinki, Finland
[9] Univ British Columbia, Dept Med Genet, Vancouver, BC V5Z 1M9, Canada