[1] Durham Vet Affairs Med Ctr, Ctr Hlth Serv Res Primary Care, Durham, NC USA
[2] Duke Univ, Med Ctr, Dept Med, Div Gen Internal Med, Durham, NC 27710 USA
[3] VA Connecticut Healthcare Syst, West Haven, CT USA
[4] Yale Univ, Dept Med, New Haven, CT 06520 USA
[5] Duke Univ, Med Ctr, Dept Biostat & Bioinformat, Durham, NC USA
[6] Duke Univ, Med Ctr, Dept Med, Div Endocrinol, Durham, NC 27710 USA
[7] VA Greater Angeles Healthcare Syst, Ctr Study Healthcare Innovat Implementat & Policy, VA Hlth Serv Res & Dev HSR&D, Los Angeles, CA USA
[8] Univ Calif Los Angeles, Geffen Sch Med, Los Angeles, CA USA