[1] Miriam Hosp, Womens Med Collaborat Lifespan, Dept Med, Providence, RI 02904 USA
[2] Univ Pittsburgh, Med Ctr UPMC, Internal Med Residency Program, Mckeesport, PA USA
[3] Brown Univ, Dept Obstet & Gynecol, Warren Alpert Med Sch, Providence, RI 02912 USA
[4] Brown Univ, Dept Pathol & Lab Med, Warren Alpert Med Sch, Providence, RI 02912 USA
[5] Brown Univ, Women & Infants Hosp, Providence, RI USA