- Correspondence to Dr Z Miao, Department of Interventional Neuroradiology, Beijing Tian Tan Hospital, Capital Medical University, 6 Tiantan Xili, Dongcheng District, Beijing 100050, China;
- Received July 2, 2014
- Revised September 26, 2014
- Accepted September 26, 2014
- First published October 20, 2014.
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