1. RAND Corporation, Santa Monica, CA, USA
2. RAND Center for Collaborative Research in Complementary and Integrative Health, Santa Monica, CA, USA
3. Northwestern Health Sciences University, Bloomington, MN, USA
4. Program on Integrative Medicine, Physical Medicine and Rehabilitation, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
5. Department of Health, Society, and Behavior, Program in Public Health, and Department of Neurology, School of Medicine, Susan and Henry Samueli College of Health Sciences, University of California, Irvine, USA