CRP and amyotrophic lateral sclerosis: Figure 8 shows the linear relationship between plasma levels of the acute phase reactant serum amyloid A (SAA) and CRP (R2 = 0.25, p = 0.004, n = 31) in baseline specimens from ALS patients with high CRP confirming that the immune activation in patients with high CRP is not isolated but a component of a generalized acute phase reaction.