MUSK and myasthenia gravis: The difference of mean current inhibition between the AChR-Ab positive and the other MG or HC sera was not significant (8.8%±1.2% in HC sera, 10.8%±3.0% in MuSK-Ab positive sera, 17.4%±2.5% in SNMG sera and 15.4%±2.2% in AChR-Ab positive sera, p=0.1242, one-way ANOVA; figure 3D).