Funding for this research was provided by:
National Research Foundation of Korea (NRF) grant funded by the Korea government (2014R1A5A2009242, 2019R1F1A1063853, 2017M3A9G8083382)
grant from the National R&D Program for Cancer Control, Ministry of Health and Welfare, Republic of Korea (1420040)
grant of the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare, Republic of Korea (HI17C1142)
National Research Foundation of Korea (NRF) grant funded by the Korea government (NRF-2019R1A2C1006264)
Received: 22 November 2019
Accepted: 21 September 2020
First Online: 29 September 2020
Ethics approval and consent to participate
: Informed consent was obtained from all patients, and the protocol used in this study was approved by the Institutional Review Board Committee of Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea (no. 2016–10-008). In addition, the specific inclusion and exclusion criteria were defined in the approved Institutional Review Board protocol. Informed consent was obtained from all patients by written document.
: Not applicable.
: The authors declare that they have no competing interests.