ERAP1 and Behcet disease: In addition to the HLA class I region, in which different peaks of association have been detected, a relationship of the disease with IL23R and IL10 has been described using a large scale SNP genotyping strategy (genome wide association studies, GWAS) in different Caucasian and Asian populations [6]–[11].Very recently, the ERAP1 gene has been proposed as a new susceptibility locus for BD in a Turkish patient cohort [12].