1. Department of Family and Community Medicine, University of California Davis School of Medicine, 4860 Y Street, Suite 2300, Sacramento, CA 95817, USA,
2. Department of Family and Community Medicine, University of California Davis School of Medicine, 3700 Business Drive, Suite 130, Sacramento, CA 95817, USA
3. Department of Medicine, Patient Education Research Center, Stanford University School of Medicine, 1000 Welch Road, Suite 204, Palo Alto, CA 94304, USA
4. Center for Healthcare Policy and Research, Department of Family and Community Medicine, University of California Davis School of Medicine, 4860 Street, Suite 2300, Sacramento, CA 95817, USA