Treatment for low-risk gestational trophoblastic disease: comparison of single-agent methotrexate, dactnomycin and combination regimens - Abrão, Renato Antonio; Andrade, Jurandyr Moreira de; Tiezzi, Daniel Guimarães; Marana, Heitor Ricardo Cosiski; Reis, Francisco José Candido dos; Clagnan, Willian Simões (Gynecologic Oncology, 2008)