Kantake, Masato http://orcid.org/0000-0002-9392-3562
Ohkawa, Natsuki
Iwasaki, Tomohiro
Ikeda, Naho
Awaji, Atsuko
Saito, Nobutomo
Shoji, Hiromichi
Shimizu, Toshiaki
Article History
Received: 21 December 2017
Accepted: 9 May 2018
First Online: 18 May 2018
Ethics approval and consent to participate
: This study was approved by the Juntendo University Ethics Committee and conducted according to the principles of the Declaration of Helsinki, and written informed consent from the parents of participants of this study had been obtained.
: The authors declare that they have no competing interests.
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