Funding for this research was provided by:
Ministry of Health, Labour and Welfare (19FC1006)
Japan Agency for Medical Research and Development (17ek010935h0003)
Text and Data Mining valid from 2019-11-09
Received: 12 September 2019
Accepted: 24 October 2019
First Online: 9 November 2019
Compliance with Ethical Standards
: Toshimi Michigami, Kanako Tachikawa, Miwa Yamazaki, Masanobu Kawai, Takuo Kubota, and Keiichi Ozono declare that they have no conflict of interest.
: Informed consent was obtained from the patients or guardians of minor patients.