1. Department of Physical Medicine and Rehabilitation; University of Pittsburgh; Pittsburgh Pennsylvania U.S.A
2. Center for Neuroscience; University of Pittsburgh; Pittsburgh Pennsylvania U.S.A
3. Department of Health Promotion and Development; University of Pittsburgh; Pittsburgh Pennsylvania U.S.A
4. Safar Center for Resuscitation Research; University of Pittsburgh; Pittsburgh Pennsylvania U.S.A
5. Department of Critical Care Medicine; University of Pittsburgh; Pittsburgh Pennsylvania U.S.A