Footnotes

• Contributors All three authors contributed to this study. SL and S-PL wrote the manuscript. S-PL treated the patient and interpreted the results with D-WS and SL. S-PL approved the final version of the manuscript. All authors have read and approved the final version submitted.

• Competing interests None.

• Patient consent Obtained.

• Ethics approval Seoul National University Hospital.

• Provenance and peer review Not commissioned; internally peer reviewed.