Hibi, M
Oishi, S
Matsushita, M
Yoneshiro, T
Yamaguchi, T
Usui, C
Yasunaga, K
Katsuragi, Y
Kubota, K
Tanaka, S
Saito, M
Article History
Received: 12 April 2016
Revised: 6 June 2016
Accepted: 23 June 2016
First Online: 19 July 2016
Competing interests
: Masanobu Hibi, Sachiko Oishi, Tohru Yamaguchi, Koichi Yasunaga and Yoshihisa Katsuragi are employees of the Kao Corporation. The other authors have no personal or financial conflicts of interest.