- Correspondence to Dr Qingwen Jin, Department of Neurology, The People's Hospital of Jiangsu Province, 300 Guanzhou Road, Nanjing, Jiangsu Province 210029, China;
- Received February 13, 2015
- Revised April 20, 2015
- Accepted May 13, 2015
- First published June 10, 2015.
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