"disease_ontology"^^ . . . _:vb50939828 . "OMIM:108420"^^ . "A male infertility characterized by azoospermia or severe oligozoospermia that has_material_basis_in inversions on chromosome 1."^^ . _:vb50939828 . . "SPGF2"@en . "spermatogenic failure 2"^^ . _:vb50939828 . . _:vb50939828 . "DOID:0070164"^^ . _:vb50939828 .