Funding for this research was provided by:
Japan Society for the Promotion of Science (20K16791)
Clinical Research Promotion Foundation (N/A)
Kaibara Morikazu Medical Science Promotion Foundation (N/A)
Kawano Masanori Memorial Public Interest Incorporated Foundation for Promotion of Pediatrics (N/A)
Received: 18 June 2020
Revised: 18 August 2020
Accepted: 7 October 2020
First Online: 15 October 2020
Compliance with ethical standards
: The scientific guarantor of this publication is Akio Hiwatashi.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: This single-institute prospective study was approved by the institutional review board. Informed consent was obtained from all patients.
: Institutional Review Board approval was obtained.
: <i>•</i> Prospective<i>•</i> Diagnostic or prognostic study