_:vb50944539 . _:vb50944539 "A psoriasis that has_material_basis_in variation in a region on chromosome 1q21."^^ . _:vb50944539 "url:https://www.ncbi.nlm.nih.gov/pubmed/9886260"^^ . _:vb50944539 . _:vb50944539 . _:vb50944539 . _:vb50944539 .