UBAC2 and Behcet disease: Using data from 611 Japanese BD patients and 737 Japanese controls who participated in our previous genome-wide association study, we analyzed the 58 genotyped single-nucleotide polymorphisms (SNPs) in the region 100 kb upstream and downstream of UBAC2. We also performed imputation analysis in the region, with 562 imputed SNPs included in the statistical analyses.