Funding for this research was provided by:
Japan Society for the Promotion of Science (17K04506)
Received: 4 August 2020
Accepted: 17 November 2020
First Online: 2 December 2020
Ethics approval and consent to participate
: This study adhered to the tenets of the Declaration of Helsinki and was approved by the Institutional Review Board committee of Kawasaki Medical School (registration number: 3473). Additionally, oral informed consent for the examinations was obtained from each patient. If the patient was a minor (under the age of 16), informed consent for the examinations was obtained from one of the parents. The institutional review board committee at Kawasaki Medical School did not require written informed consent for this study as it was a non-invasive observational studies using only existing clinical data.
: Not applicable.
: The authors declare that they have no competing interests.