MUSK and myasthenia gravis: Nemoto et al. found positive jitter in 93% of AChR antibody-positive patients but only in 50% of MuSK antibody-positive patients and the extent of jitter was more in AChR antibody-positive MG patients compared with AChR-negative MG patients (MCD: 76 μs in AChR antibody-positive patients, 36 μs in MuSK antibody-positive patients) [68].