[1] Chosun Univ Hosp, Dept Neurol, Gwang Ju 61453, South Korea
[2] Chonbuk Natl Univ, Med Sch, Dept Neurol, Jeonju 54907, South Korea
[3] Chonbuk Natl Univ, Chonbuk Natl Univ Hosp, Biomed Res Inst, Res Inst Clin Med,Dept Neurol, Jeonju 54907, South Korea