Hyun Ah Chung, Sun-Young Lee, Jeong Hwan Kim, In-Kyung Sung, Hyung Seok Park, Chan Sup Shim, Department of Internal Medicine, Konkuk University School of Medicine, Seoul 05030, South Korea
Hee Won Moon, Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul 05030, South Korea
Hye Seung Han, Department of Pathology, Konkuk University School of Medicine, Seoul 05030, South Korea
Author contributions: Chung HA and Lee SY wrote the manuscript; Lee SY designed research; Chung HA, Moon HW and Han HS analyzed data; Kim JH, Sung IK, Park HS and Shim CS supervised the study.
Supported by Konkuk University in 2015, No. KU2015-A019-0 270.
Institutional review board statement: The study was reviewed and approved for publication by the institutional review board of the Konkuk University School of Medicine (KUH1010625).
Clinical trial registration statement: This study was registered at ClinicalTrials.gov ID: KCT0001302 (https://cris.nih.go.kr) after the approval by the institutional review board of the Konkuk University School of Medicine (KUH1010625).
Informed consent statement: Written informed consent was obtained from all the participants before the procedure as described in the MATERIALS AND METHODS section.
Conflict-of-interest statement: No authors have any conflict of interest.
Data sharing statement: The original anonymized database is available for collaborative studies via the corresponding author, firstname.lastname@example.org.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Sun-Young Lee, MD, PhD, Department of Internal Medicine, Konkuk University School of Medicine, 120-1 Neungdong-ro, Gwangjin-gu, Seoul 05030, South Korea. email@example.com
Telephone: +82-2-20307747 Fax: +82-2-20307748
Received: December 27, 2015
Peer-review started: December 28, 2015
First decision: January 30, 2016
Revised: June 5, 2016
Accepted: July 11, 2016
Article in press: July 13, 2016
Published online: August 15, 2016