[1] Chang Gung Univ, Coll Med, Chang Gung Mem Hosp, Kaohsiung Med Ctr,Dept Neurol, Kaohsiung, Hsien, Taiwan
[2] Chang Gung Univ, Coll Med, Chang Gung Mem Hosp, Kaohsiung Med Ctr,Dept Neurosurg, Kaohsiung, Hsien, Taiwan
[3] Chang Gung Univ, Coll Med, Chang Gung Mem Hosp, Kaohsiung Med Ctr,Dept Radiol, Kaohsiung, Hsien, Taiwan
[4] Natl Sun Yat Sen Univ, Dept Biol Sci, Kaohsiung 80424, Taiwan