MMP9 and B-cell chronic lymphocytic leukemia: Two non-synonymous SNPs in MMP9 (279Q>R, rs17576; 668R>Q, rs2274756) influenced SLL/CLL status (p = 7.0×10−3, q = 9.5×10−2; p = 1.0×10−2, q = 9.5×10−2, respectively; Tables 2, S2).