1. Cecil G. Sheps Center for Health Services Research, University of North Carolina, Chapel Hill, North Carolina, USA.
2. University of North Carolina Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA.
3. Department of Nutrition, University of North Carolina Gillings School of Global Public Health, Chapel Hill, North Carolina, USA.
4. University of North Carolina Kenan-Flagler Business School, Chapel Hill, North Carolina, USA.
5. BlueCross BlueShield North Carolina, Durham, North Carolina, USA.
6. Department of Epidemiology, University of North Carolina Gillings School of Global Public Health, Chapel Hill, North Carolina, USA.
7. Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
8. Prime Therapeutics, LLC, Eagan, Minnesota, USA.