Single nucleotide polymorphisms in CSNK1E (rs135745), TIMELESS rs4630333, CRY2 (rs10838524), PER3 (rs707467 and rs10462020), RORB (rs1157358, rs7022435, rs3750420, and rs3903529), REV-ERBA (rs2314339) are strongly related to BD (8, 10–12, 69). This evidence concerns the gene PER3 and Behcet disease.