_:vb50942388 . _:vb50942388 . _:vb50942388 . _:vb50942388 "An alpha thalassemia that has_material_basis_in mutation in the ATRX gene on Xq21."^^ . _:vb50942388 . _:vb50942388 . _:vb50942388 "url:https://www.ncbi.nlm.nih.gov/pubmed/7697714"^^ . _:vb50942388 "url:https://www.ncbi.nlm.nih.gov/pubmed/1415255"^^ .