The research was supported by the Department of Veterans Affairs, Veterans Health Administration (VHA), Health Sevices Research and Development Service Quality Enhancement Research Initiative (RRP 07-295), award number KL2RR025746 from the National Center for Research Resources, award number K23NS058571 from the National Institutes of Health/National Institute of Neurological Disorders and Stroke, and the Singapore Ministry of Health’s National Medical Research Council under its STaR Award Grant. The authors take sole responsibility for the scientific validity and accuracy of the methodology, results, statistical analyses, and conclusions presented.