Sasaki, Hatoko
Kakee, Naoko
Morisaki, Naho
Mori, Rintaro
Ravens-Sieberer, Ulrike
Bullinger, Monika
Funding for this research was provided by:
Ministry of Health, Labour and Welfare (H28-Nanchitou-Shitei-004)
Article History
Received: 2 October 2017
Accepted: 23 April 2018
First Online: 2 May 2018
Competing interest
: The authors declare that they have no competing interests.
: In both the pre-test and field-test phases verbal consent was obtained from children aged 8 to 18 years. Written consent was requested from children older than 16 years or those who had the maturity to understand the relevant conditions and their parents. This study was approved by the Ethical Review Board of the National Center for Child Health and Development in Tokyo, Japan (Reference No. 734 and No. 750).
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