Kobayashi, R.
Kobayashi, T.
Sakai, F.
Hosoya, T.
Yamamoto, M.
Kurita-Ochiai, T.
Article History
Received: 23 June 2015
Accepted: 7 March 2017
First Online: 3 April 2017
Competing Interests
: Toshiya Kobayashi, F.S., and T.H. are employees of Megmilk Snow Brand Co., Ltd. R.K., M.Y. and Tomoko Kurita-Ochiai declare no conflict of interest.