Figure 8 Correlation between the area under the curve (AUC) of electrical field stimulation (EFS) induced relaxation of human fundic muscular strips and the proportion of nitric oxide synthase (NOS) immunoreactive neurones. The correlation was calculated in the four control sera and six achalasia patient sera, for which both neurochemical coding and the ex vivo motility study were performed. NSE, neurone specific enolase.