[1] Northwestern Univ, Feinberg Sch Med, Dept Prevent Med, Chicago, IL 60611 USA
[2] Univ Illinois, Coll Publ Hlth, Dept Epidemiol & Biostat, Prevent Sci & Methodol Grp, Chicago, IL USA
[3] Univ Illinois, Div Biostat, Chicago, IL USA
[4] Columbia Univ, Dept Psychiat, New York, NY 10027 USA
[5] Columbia Univ, Dept Biostat, New York, NY 10027 USA
[6] NY State Psychiat Inst, Div Biostat, New York, NY USA
[7] Stanford Univ, Sch Med, Dept Hlth Res & Policy, Stanford, CA 94305 USA
[8] UCLA Hlth Serv Res Ctr, Los Angeles, CA USA
[9] Univ Illinois, Ctr Hlth Stat, Chicago, IL USA