_:vb50952089 . _:vb50952089 . _:vb50952089 "An ovarian benign neoplasm that is has_material_basis_in a mixture of gonadal elements."^^ . _:vb50952089 . _:vb50952089 . _:vb50952089 . _:vb50952089 "url:https://www.ncbi.nlm.nih.gov/pubmed/21879333"^^ .