Sun, Huaijing
Mei, Qingsong
Shikha, Swati
Liu, Jinliang
Zhang, Jing
Zhang, Yong
Funding for this research was provided by:
National Natural Science Foundation of China (31671011)
Ministry of Education of Singapore (MOE2016-T3-1-004, R-397-000-270-114)
Article History
Received: 24 September 2018
Accepted: 4 January 2019
First Online: 12 January 2019
Compliance with ethical standards
: The authors declare that they have no competing interests.