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Contributors SHJ conceived and designed the study and was involved in funding and data acquisition, manuscript development, and manuscript writing. JSP, DGS and SHK participated in the design of the study and collection of data. MSK participated in manuscript development, data acquisition, manuscript writing and manuscript authorisation. All authors reviewed the manuscript.
Funding This work was supported by the National Research Foundation (NRF) of Korea Grant funded by the Korean Government (MSIP) (2018R1A2B6000996).
Competing interests None declared.
Patient consent Obtained.
Ethics approval The study protocol was approved by the Institutional Review Board of Yeungnam University Hospital.
Provenance and peer review Not commissioned; externally peer reviewed.