1. Department of Pediatrics; College of Medicine, University of Florida; Gainesville Florida USA
2. Department of Neurology; College of Medicine, University of Florida; Gainesville Florida USA
3. Department of Applied Physiology and Kinesiology; College of Health & Human Performance, University of Florida; Gainesville Florida USA
4. Department of Physical Therapy; College of Public Health & Health Profession, University of Florida; P.O. Box 100296 Gainesville Florida 32610 USA