1. Department of Pediatrics, University Hospital, Leiden, The Netherlands.
2. Radiogical Institute TNO, Rijswijk, the Netherlands.
3. Department of Pathology, the Biological Sciences Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599.
4. Departments of Neurology, Psychiatry and the Biological Sciences Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599.
5. Department of Neurology, Neurological Institute, Faculty of Medicine, Kyushu University, Fukuoka, Japan
6. Department of Radiobiology, Erasmus University, Rotterdam, Netherlands.