Figure 2.
Worldwide distribution of α-thalassemia. Predominant global distribution of α-thalassemia mutations (including α0 deletions) (A) and Hb Bart’s hydrops fetalis (B). It should be noted that, as a result of migration, these genotypes are now widely present in many other areas. Reproduced with permission, with minor modifications, from Piel and Weatherall.1
