Nakashima, Toshinori
Inoue, Hirosuke
Fujiyoshi, Junko
Matsumoto, Naoko
Article History
Received: 25 August 2015
Revised: 28 December 2015
Accepted: 28 December 2015
First Online: 25 January 2016
Compliance with ethical standards
: The children’s parents provided written informed consent according to the Declaration of Helsinki, and ethics approval was obtained from the institutional review board.
: The authors declare that no conflict of interest exists.
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