Received: 8 October 2019
Accepted: 4 February 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: This study was performed with the approval of the Institutional Review Board of Sanshikai TOHO Hospital Ethics Committee (Clinical Research), reference number 18006.
: All patients have signed a comprehensive agreement to use the collected samples that accompany their treatment for future medical research. The contents of the research are thoroughly deliberated by the Ethics Committee, and the data were used within the scope approved. If the patient refused or withdrew consent, there will be no penalty for medical treatment. The samples were anonymized to ensure that individuals could not be identified, and the utmost care was taken to protect personal privacy.
: The authors declare that they have no competing interests.