- Correspondence to Professor Byung Moon Kim, Interventional Neuroradiology, Department of Radiology, Severance stroke center, Severance Hospital, Yonsei University College of Medicine, Seoul 03722, Republic of Korea;
- Received November 10, 2017
- Revised January 31, 2018
- Accepted February 19, 2018
- First published March 8, 2018.
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