Fig. 1

Distribution of ethnic populations in mainland China and Taiwan. The ethnic groups presented in this review are schematically depicted. The DEL phenotype or RHD*DEL1 genotype has been studied for Han, as the prevalent ethnicity, in many regions, provinces and cities (purple) but not in all (yellow). The data for Hui (blue) and Uyghur ethnicities (green) came from Ningxia and Xinjiang, respectively. No data on the DEL phenotype or RHD*DEL1 genotype is available for the remaining 53 ethnic populations in their typical regions of settlement (grey, see Table 1)