[1] Northwestern Univ, Dept Prevent Med, Feinberg Sch Med, Chicago, IL 60611 USA
[2] Univ Michigan, Dept Psychol, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Ctr Bioeth & Social Sci Med, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Dept Womens Studies, Ann Arbor, MI 48109 USA
[5] Von Voigtlander Womens Hosp, Dept Obstet & Gynecol, Ann Arbor, MI USA
[6] Univ Michigan, Dept Radiat Oncol, UHB2C490,SPC 5010,1500 East Med Ctr Dr, Ann Arbor, MI 48109 USA
[7] Univ Michigan, Dept Afroamer & African Studies, Ann Arbor, MI 48109 USA