OBJECTIVE: We aimed to determine the effectiveness of IV immunoglobulin (IVIG) in the treatment of patients with myasthe目的：通过一项随机、安慰剂对照的设盲研究来测定病情严重的重症肌无力患者应用免疫球蛋白（IVIG）的有效性。
Isolation and Purification of CD34~+ Hematopoietic Stem Cells in Bone Marrow from the Patients with Myasthenia Gravis by免疫磁珠法分离和纯化重症肌无力患者骨髓CD34~+造血干细胞