An Ag-globin G- > A gene polymorphism associated with b ( 0 ) 39 thalassemia globin gene and high fetal hemoglobin production .
O B-GeneOrGeneProduct B-SequenceVariant I-SequenceVariant I-SequenceVariant O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O O O B-GeneOrGeneProduct I-GeneOrGeneProduct O O