1. Department of Health Policy and Management Gillings School of Global Public Health University of North Carolina‐Chapel Hill Oakland CaliforniaUSA
2. Duke Clinical Research Institute Duke University Durham North CarolinaUSA
3. Department of Population Health Sciences School of Medicine Duke University Durham North CarolinaUSA
4. Division of Research Kaiser Permanente Northern California Oakland CaliforniaUSA
5. Department of Orthopedic Surgery School of Medicine Duke University Durham North CarolinaUSA