Friedman AJ, Chen Z, Ford P, Johnson CA, Lopez AM, Shander A, Waters JH, van Wyck D. J Womens Health (Larchmt). 2012 Dec;21(12):1282-9. doi: 10.1089/jwh. 2012.3713.
Departamento de Obstetrícia e Ginecologia, Beth Israel Medical Center, Nova Iorque, Nova Iorque 10003, EUA.