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Article History

Received: 29 December 2018

Revised: 5 March 2019

Accepted: 19 March 2019

First Online: 27 March 2019

Compliance with ethical standards

:

: Hyungseop Kim, In-Cheol Kim, and Sang-Woong Choi declare that they have no conflict of interest.

: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation and with the Helsinki Declaration of 1964 and later revisions.

: Waived for the patient’s death.