[1] Northwestern Univ, Dept Prevent Med, Chicago, IL 60611 USA
[2] Wake Forest Sch Med, Dept Epidemiol & Prevent, Winston Salem, NC USA
[3] Univ Washington, Dept Med, Seattle, WA USA
[4] Loyola Univ Chicago, Div Nephrol & Hypertens, Maywood, IL USA
[5] Univ Alabama Birmingham, Dept Med, Birmingham, AL 35294 USA
[6] Univ Alabama Birmingham, Dept Epidemiol, Birmingham, AL USA
[7] Univ Washington, Dept Neurol, Seattle, WA 98195 USA
[8] Univ Washington, Dept Epidemiol, Seattle, WA 98195 USA