[1] Univ Arizona, Zuckerman Coll Publ Hlth, Dept Epidemiol & Biostat, Mel & Enid, Tucson, AZ 85724 USA
[2] Univ Arizona, Dept Hlth & Pharmaceut Outcomes, R Ken Coit Coll Pharm, Tucson, AZ 85721 USA
[3] Univ Jos, Dept Obstet & Gynecol, Jos, Plateau State, Nigeria
[4] Jos Univ, Teaching Hosp, Jos, Plateau State, Nigeria
[5] Univ Arizona, Zuckerman Coll Publ Hlth, Dept Hlth Promot Sci, Mel & Enid, Tucson, AZ USA
[6] Publ Hlth Res Inst India, Mysore, India
[7] Northwestern Univ, Feinberg Sch Med, Div Canc Epidemiol & Prevent, Dept Prevent Med, Chicago, IL USA