There were errors at the acknowledgements written in Korean. The sentence “Acknowledgements: 모든 저자는 이 논문과 관련된 재정지원을 받지 않았음” should indicate the relevant funding source. The sentence should be corrected as follow.
“Acknowledgements: 본 연구는 2017년도 명지병원 임상교수 연구비 지원으로 수행했음.”