[1] Harvard Med Sch, Massachusetts Gen Hosp, Dept Med, Endocrine Div, Boston, MA 02114 USA
[2] Univ Alabama Birmingham, Sch Publ Hlth, Dept Epidemiol, Birmingham, AL 35233 USA
[3] Minneapolis VA Hlth Care Ctr, Ctr Care Delivery & Outcomes Res, Minneapolis, MN 55417 USA
[4] Univ Minnesota, Dept Med, Minneapolis, MN 55455 USA
[5] Univ Pittsburgh, Dept Anthropol, Pittsburgh, PA 15260 USA
[6] Univ Pittsburgh, Ctr Civil Rights & Racial Justice, Pittsburgh, PA 15260 USA
[7] Univ Calif Los Angeles, David Geffen Sch Med, Dept Med, Hlth Serv Res, Los Angeles, CA 90095 USA
[8] Univ Manitoba, Max Rady Coll Med, Dept Internal Med, Winnipeg, MB R3E 0T6, Canada
[9] Univ Manitoba, Max Rady Coll Med, Dept Radiol, Winnipeg, MB R3E 0T6, Canada
[10] Univ Pittsburgh, Sch Publ Hlth, Dept Epidemiol, Pittsburgh, PA 15261 USA
[11] Massachusetts Gen Hosp, Dept Med, Endocrine Div, 50 Blossom St,Thier 1051, Boston, MA 02114 USA