The Quantitatie Myasthenia Grais (QMG) Score for Disease Seerity, a alidated clinical composite scale, was calculated by a masked obserer at baseline and days 14 and 28.

• 被设盲的观察者通过定量重症肌无力疾病严重程度评分系统这一被认可的复合标准来计算基础水平和14天、28天的评分。