_:vb50942389 "url:https://www.ncbi.nlm.nih.gov/pubmed/12393486"^^ . _:vb50942389 . _:vb50942389 . _:vb50942389 . _:vb50942389 . _:vb50942389 "An alpha thalassemia that has_material_basis_in contiguous gene deletion of the hemoglobin alpha-1 (HBA1) and alpha-2 (HBA2) genes on one chromosome 16, and a defect, deletional or nondeletional, in either HBA1 or HBA2 on the other."^^ . _:vb50942389 .