- Correspondence to Professor Yang-Ha Hwang, Department of Neurology, Kyungpook National University Hospital, School of Medicine, Kyungpook National University, Daegu, Republic of Korea, 130, Dongduk-ro, Jung-gu, Daegu 41944, Republic of Korea;
- Received 14 April 2016
- Revised 2 June 2016
- Accepted 13 June 2016
- Published in print 1 July 2017.
- Published online 16 June 2017.
- Published first 5 July 2016.
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