Gemcitabine and Topotecan in Treating Patients With Recurrent or Persistent Ovarian, Fallopian Tube, or Primary Peritoneal Cavity Cancer [clinicaltrials:NCT00217555]

Gemcitabine and Topotecan in Treating Patients With Recurrent or Persistent Ovarian, Fallopian Tube, or Primary Peritoneal Cavity Cancer [clinicaltrials:NCT00217555]