FCN2 and bacterial infectious disease: Later, Pana et al. (51) reported associations of GGACT, GGATG, AGACG, GGACG FCN2 haplotypes (corresponding to SNPs at positions: −986 A>G, −602G>A, −4 A>G, +6359 C>T, and +6424 G>T, respectively, that have inconsistent influences on protein concentration) with prolonged FN episodes and bacterial infections in children diagnosed with B-cell ALL after chemotherapy.