[1] Northwestern Univ, Feinberg Sch Med, Chicago, IL USA
[2] Kaiser Permanente, Atlanta, GA USA
[3] Emory Univ, Sch Med, Atlanta, GA USA
[4] Univ Washington, Cardiovasc Hlth Res Unit, Seattle, WA 98195 USA
[5] Wake Forest Univ, Baptist Med Ctr, Winston Salem, NC 27109 USA
[6] Univ Washington, Sch Publ Hlth & Community Med, Seattle, WA 98195 USA