We are very fortunate to work with wonderful collaborators and funding agencies. We are grateful for the funding and support that we have received. Previous and current funding includes: the NIH's National Institute of Aging; the Alabama Department of Transportation; the US Department of Transportation's Research and Innovative Technology Adminstration (RITA)/University Transporation Centers; the NIH's National Center for Advancing Translational Research and The National Health and Medical Research Council (NHMRC).