Funding for this research was provided by:
Japan Society for the Promotion of Science (17K04506)
Text and Data Mining valid from 2019-08-05
Received: 17 April 2019
Accepted: 24 July 2019
First Online: 5 August 2019
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 retrospective and noninvasive one without any medical intervention.
: Not applicable.
: The authors declare that they have no competing interests.