[1] Univ Michigan, Sch Med, Dept Internal Med, 2800 Plymouth Rd,NCRC B14-G236, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Sch Publ Hlth, Dept Internal Med, 2800 Plymouth Rd,NCRC B14-G236, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Sch Med, Dept Environm Hlth Sci, 2800 Plymouth Rd,NCRC B14-G236, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Sch Publ Hlth, Dept Environm Hlth Sci, 2800 Plymouth Rd,NCRC B14-G236, Ann Arbor, MI 48109 USA
[5] Univ Michigan, Sch Med, Dept Obstet & Gynecol, 2800 Plymouth Rd,NCRC B14-G236, Ann Arbor, MI 48109 USA
[6] Univ Michigan, Sch Publ Hlth, Dept Obstet & Gynecol, 2800 Plymouth Rd,NCRC B14-G236, Ann Arbor, MI 48109 USA