Received: 2 March 2020
Accepted: 20 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: This study was performed in accordance with the Declaration of Helsinki. It has been approved by the institutional review board of the Gangnam Severance Hospital and the Clinical Research Information Service (KCT0001875), a non-profit registration system to secure ethics of clinical trials in Korea. Full written informed consent has been obtained from all patients.Consent for publication: Not applicable.
: The authors declare that they have no competing interests.