HLA-B and Behcet disease: Only the rs2259571 SNP had a significantly decreased phenotypic, but not allelic, frequency of the rs2259571T variant in BD patients (72.1%, Chi squared 9.31, pc = 0.014) compared to healthy population (91.3%) without a significantly different phenotypic distribution of the rs2259571G variant between BD patients and HC despite its LD with the HLA-B*51 (pc = 9E-5).