[1] COLUMBIA UNIV, SCH ENGN & APPL SCI, DEPT CHEM ENGN, NEW YORK, NY 10027 USA
[2] COLUMBIA UNIV, COLL PHYS & SURG, DEPT OBSTET & GYNECOL, NEW YORK, NY 10027 USA
[3] ST LUKES HOSP CTR, OBSTET & GYNECOL SERV, NEW YORK, NY USA
[4] COLUMBIA UNIV, SCH ENGN & APPL SCI, DEPT APPL CHEM, NEW YORK, NY 10027 USA
[5] COLUMBIA UNIV, COLL PHYS & SURG, DEPT PHARMACOL, NEW YORK, NY USA