益气牵正汤治疗重症肌无力性上睑下垂远期疗效观察
익기견정탕치료중증기무력성상검하수원기료효관찰
A long-term follow-up result of clinical observation in treatment of ptosis with myasthenia gravis with yiqiqianzhengtang(益气牵正汤)
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