[1] Brown Univ, Warren Alpert Sch Med, Dept Community Hlth, Providence, RI 02912 USA
[2] Brown Univ, Warren Alpert Sch Med, Dept Obstet & Gynecol, Providence, RI 02912 USA
[3] Boston Univ, Sch Publ Hlth, Dept Social & Behav Sci, Boston, MA USA
[4] Univ Illinois, Coll Nursing, Dept Publ Hlth Mental Hlth & Adm Nursing, Chicago, IL USA
[5] Rhode Isl Hosp, Div Gen Internal Med, Providence, RI 02903 USA