Map of α-globin deletions found in the BHFS survivors. The α-globin cluster on human chromosome 16 (16p13.3). Genes in the region and the major α-cis-regulatory element (HS-40) are shown in the middle panel. The extent of the deletions found in the BHFS survivors reported in this study is shown by red bars. HVR, hypervariable region; ps, pseudogene. (Locations refer to reference genome hg19.)