_:vb50942920 . _:vb50942920 . _:vb50942920 "An osteogenesis imperfecta that has_material_basis_in mutation in the BMP1 gene on chromosome 8p21."^^ . _:vb50942920 . _:vb50942920 "url:https://www.ncbi.nlm.nih.gov/pubmed/22052668"^^ . _:vb50942920 . _:vb50942920 .