[1] Univ North Carolina Chapel Hill, Gillings Sch Global Publ Hlth, Dept Hlth Policy & Management, Chapel Hill, NC 27599 USA
[2] Univ North Carolina Chapel Hill, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA
[3] North Carolina State Univ, Dept Ind & Syst Engn, Raleigh, NC USA
[4] Univ Florida, Herbert Wertheim Coll Engn, Dept Ind & Syst Engn, Gainesville, FL USA
[5] Oregon Hlth & Sci Univ, Oregon Rural Practice Based Res Network, Portland, OR USA
[6] Oregon Hlth & Sci Univ, Dept Family Med, Portland, OR USA
[7] Portland State Univ, Oregon Hlth & Sci Univ, Sch Publ Hlth, Portland, OR USA
[8] Univ North Carolina, Dept Med, Sch Med, Div Gen Med & Clin Epidemiol, Chapel Hill, NC USA
[9] Univ North Carolina Chapel Hill, Ctr Hlth Promot & Dis Prevent, Chapel Hill, NC USA