Zhen Li, Yingxin Yang, Yan Lu, Dachuan Liu, Erhe Xu, Jianping Jia, Diya Yang, Xiaojun Zhang, Huiqing Yang, Daqing Ma and Ningli Wang*
* Corresponding author: Ningli Wang wningli@vip.163.com
BMC Neurology 2012, 12:66 doi:10.1186/1471-2377-12-66