- Correspondence to Han-Wook Yoo and Professor Beom Hee Lee, Department of Pediatrics, Asan Medical Center Children’s Hospital, University of Ulsan College of Medicine, Songpa-gu, Seoul 05505, Korea; ,
- Received 29 March 2017
- Revised 5 July 2017
- Accepted 24 July 2017
- Published in print 1 November 2017.
- Published online 23 October 2017.
- Published first 23 August 2017.
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