[1] Brown Univ, Warren Alpert Sch Med, Women & Infants Hosp Rhode Isl, Providence, RI 02912 USA
[2] UNESP, Fac Med Botucatu, Lab Pesquisa Expt Ginecol & Obstet, Botucatu, SP, Brazil
[3] Univ Sao Paulo, Fac Ciencias & Farmaceut, Dept Anal Clin & Toxicol, Sao Paulo, Brazil