Tatsumura, Masaki http://orcid.org/0000-0002-3679-9438
Gamada, Hisanori http://orcid.org/0000-0002-7860-7094
Okuwaki, Shun
Eto, Fumihiko
Nagashima, Katsuya http://orcid.org/0000-0002-4209-6990
Ogawa, Takeshi
Mammoto, Takeo http://orcid.org/0000-0002-9055-0756
Hirano, Atsushi
Koda, Masao http://orcid.org/0000-0003-0982-5386
Yamazaki, Masashi http://orcid.org/0000-0002-9293-3531
Article History
Received: 16 June 2020
Accepted: 30 December 2020
First Online: 13 January 2021
Ethics approval and consent to participate
: All procedures including review of patient record used in this research were approved by the institutional review board of Tsukuba University Hospital Mito Clinical Education and Training Center/ Mito Kyodo General Hospital (No.17 − 01). Verbal informed consents were obtained from all patients and their parent to participate in this study. An IRB approve the study and the procedure outlined for the verbal consent obtainment.
: Written informed consent for publication was obtained from the patients included in this study.
: The authors declare that there are no relevant competing interest.