Funding for this research was provided by:
Ministry of Science and ICT, Korea (2017K1A3A1A12073341)
Text and Data Mining valid from 2019-01-10
First Online: 10 January 2019
Compliance with Ethical Standards
: Sohyun Jeong, Ha Jin Tchoe, Junqing Li, and Ju-Young Shin have no conflicts of interest that are directly relevant to the content of this study.
: This research was supported by a Grant from the Korean Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (Grant no.: NHCR-HC17C0020).
: This study was approved by the institutional review board of the Sungkyunkwan University in South Korea (SKKU-IRB-2016-10-013). All personal identifying information of patients was anonymous; therefore, informed consent was waived by the institutional review board for this study.
: The guarantors affirm that the manuscript is an honest, accurate, and transparent account of the study being reported; that no important aspects of the study have been omitted; and that any discrepancies from the study as planned (and, if relevant, registered) have been explained.
: No additional data available.