1. Department of Neuropsychology, Kennedy Krieger Institute, Baltimore, MD, USA
2. Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
3. Department ofPediatric Rehabilitation, Kennedy Krieger Institute, Baltimore, MD, USA
4. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA
5. Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Boston, MA, USA
6. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA