Retraction: Studies on the genetic pathogenesis of myasthenia gravis caused by CTLA-4 gene polymorphism.
Mao
H T
HT
Institute of Basic Medical Research, Shandong Academy of Medical Science, Jinan, Shandong 250062, P.R.China.
Wang
X B
XB
Zhang
L
L
Gu
H T
HT