_:vb50944541 . _:vb50944541 . _:vb50944541 . _:vb50944541 "A psoriasis that has_material_basis_in variation in a region on chromosome 3q21."^^ . _:vb50944541 . _:vb50944541 "url:https://www.ncbi.nlm.nih.gov/pubmed/10573011"^^ . _:vb50944541 .