[1] Yale Sch Publ Hlth, Dept Social & Behav Sci, New Haven, CT 06510 USA
[2] Yale Sch Med, Equ Res & Innovat Ctr, New Haven, CT 06510 USA
[3] Yale Sch Med, Dept Internal Med, New Haven, CT 06510 USA
[4] Ibis Reprod Hlth, Cambridge, MA 02140 USA
[5] Univ West Indies, Fac Med Sci, Dept Family Med, BB-11000 Cave Hill, Barbados
[6] Univ Puerto Rico, Grad Sch Publ Hlth, Dept Biostat & Epidemiol, Med Sci Campus, San Juan, PR 00936 USA
[7] Univ Virgin Isl, Sch Nursing, St Thomas, VI 00802 USA
[8] Univ West Indies, Dept Paraclin Sci, St Augustine, Trinidad Tobago