The researchers concluded that the different alleles of HLA-G genes have different effects on the risk of developing BD—the HLA-G* allele 01:01:01 is associated with a reduced risk of developing BD, while HLA-G* alleles 01:01:02 and G*01:05N are associated with an increased risk of developing BD [127,128]. Here, HLA-G is linked to Behcet disease.