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