[1] William F Connell Sch Nursing, Chestnut Hill, MA 02467 USA
[2] Univ Massachusetts, Sch Nursing, Lowell, MA USA
[3] Jacobi Med Ctr, Dept Obstet, New York, NY USA
[4] Montefiore Med Ctr North, Dept Obstet, Bronx, NY USA
[5] North Cent Bronx Hosp, Dept Obstet, Bronx, NY USA
[6] Montefiore Med Ctr, Dept Nursing, Bronx, NY 10467 USA