MUSK and myasthenia gravis: On the day of admission, she completed a neurological examination and was tested with a quantitative MG (QMG) score of 18 points and MG-specific activities of daily living scale (MG-ADL) score of 10 points (Myasthenia Gravis Foundation of America IIIb, MGFA IIIb), and serological immune testing for MuSK-Ab (1:320, tested by CBA) (Supplementary Figure 1).