NFKBIL1 and non-Hodgkin lymphoma: We further provide new evidence using haplotype analysis that additional variants in chromosome 6p21.3 (NFKBIL1-encoding IKBL1 and thought to be a negative regulator of NF-kappa-B activation) may be important for NHL risk, thus further implicating this chromosomal region in which the search for causal SNPs should be pursued.