. _:vb50941807 . "ORDO:289157"^^ . _:vb50941807 . _:vb50941807 . "disease_ontology"^^ . "vitamin D-dependent rickets type 1B"@en . "OMIM:600081"^^ . . _:vb50941807 . . _:vb50941807 . "A vitamin D-dependent rickets that is characterized by abnormally low levels of calcitriol and that has_material_basis_in homozygous, compound heterozygous, or heterozygous mutation in the CYP2R1 gene on chromosome 11p15."^^ . "DOID:0080887"^^ . .