Fang, Hong-Hua http://orcid.org/0000-0003-3636-1011
Adjokatse, Sampson
Shao, Shuyan
Even, Jacky http://orcid.org/0000-0002-4607-3390
Loi, Maria Antonietta
Article History
Received: 4 September 2017
Accepted: 19 December 2017
First Online: 16 January 2018
Competing interests
: The authors declare no competing financial interests.