[1] Univ Michigan, Sch Nursing, Dept Hlth Behav & Biol Sci, Ann Arbor, MI 48109 USA
[2] Boston Univ, Sch Publ Hlth, Dept Global Hlth, Boston, MA USA
[3] Univ Michigan, Sch Nursing, Appl Biostat Lab, Ann Arbor, MI 48109 USA
[4] Johns Hopkins Bloomberg Sch Publ Hlth, Dept Mental Hlth, Baltimore, MD USA
[5] Africare Zambia, Lusaka, Zambia