1. Department of Applied Physiology and Kinesiology, University of Florida , Gainesville, FL 32603 , USA
2. KBR , Houston, TX 77002 , USA
3. German Aerospace Center (DLR) , D-51147 Koeln , Germany
4. NASA Johnson Space Center , Houston, TX 77058 , USA
5. Norman Fixel Institute for Neurological Diseases, University of Florida , Gainesville, FL 32603 , USA