- Correspondence to Dr Hyungseop Kim, Keimyung University Dongsan Medical Center,56 Dalseong-Ro, Jung-Gu, Daegu 41931, Republic of Korea;
- Received 20 January 2017
- Revised 22 May 2017
- Accepted 24 May 2017
- Published in print 1 June 2017.
- Published online 26 June 2017.
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