Proc. R. Soc. A 472, 20150712. (Published online 3 February 2016) (doi:10.1098/rspa.2015.0712)
The affiliations for Hao Liu were incorrectly published. The affiliations should have appeared as
Hao Liu4,6
4Graduate School of Engineering, Chiba University, Chiba, Japan
6Shanghai-Jiao Tong University and Chiba University International, Cooperative Research Centre (SJTU-CU ICRC), Minhang, Shanghai, China
