Yamamoto, Kazuna
Kamei, Koichi
Sato, Mai
Ogura, Masao
Suzuki, Mari
Hasegawa, Yuichi
Ueoka, Katsuhiko
Ito, Shuichi
Ishikura, Kenji
Article History
Received: 25 April 2018
Revised: 26 August 2018
Accepted: 31 August 2018
First Online: 25 September 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The design and execution of this study were in accordance with the ethical standards of the Declaration of Helsinki. The protocol was approved by the Ethics Committee of the National Center for Child Health and Development (No. 1372).
: For this type of study, formal informed consent is not required.