[1] Univ Tennessee, Dept Publ Hlth, Knoxville, TN 37996 USA
[2] Univ Virginia, Fac Med, Orphans & Vulnerable Childrens Project Africa, Charlottesville, VA 22911 USA
[3] Univ Virginia, Fac Med, Dept Int Hlth, Johns Hopkins Bloomberg Sch Publ Hlth, Charlottesville, VA 22911 USA
[4] Univ Virginia, Fac Med, Dept Publ Hlth Sci, Charlottesville, VA 22911 USA
[5] Univ Virginia, Guatemala Initiat, Sch Med, Charlottesville, VA 22902 USA
[6] Orphans & Vulnerable Childrens Project Africa, Nairobi, Kenya