[1] Duke Univ, Dept Populat Hlth Sci, Ctr Hlth Measurement, Durham, NC USA
[2] Duke Univ, Dept Populat Hlth Sci, Ctr Hlth Measurement, Sch Med, Durham, NC USA
[3] Duke Univ, Dept Psychiat & Behav Sci, Durham, NC USA
[4] Univ N Carolina, Dept Psychol & Neurosci, Chapel Hill, NC USA
[5] St Jude Childrens Res Hosp, 332 N Lauderdale St, Memphis, TN 38105 USA
[6] Univ N Carolina, UNC Sch Med, Chapel Hill, NC USA