Nuclear factor kappa B (NF-κB), a well-known immune regulator, and inducible nitric oxide synthase (iNOS) were over-expressed in patients with primary infection, whereas the inhibition of the NF-κB/iNOS pathway was found in recurrent CE, thus suggesting an important role of these factors in host protection [16]. Here, NFKB1 is linked to cholesteryl ester measurement.