_:vb50941808 . _:vb50941808 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7303887/"^^ . _:vb50941808 . _:vb50941808 . _:vb50941808 . _:vb50941808 "url:https://pubmed.ncbi.nlm.nih.gov/26365513/"^^ . _:vb50941808 "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."^^ .