Ma, W
Huang, T
Wang, M
Zheng, Y
Wang, T
Heianza, Y
Sun, D
Smith, S R
Bray, G A
Sacks, F M
Qi, L
Article History
Received: 31 March 2016
Revised: 30 April 2016
Accepted: 18 May 2016
First Online: 27 July 2016
Competing interests
: The authors declare no conflict of interest.