Scientific Reports 6: Article number: 27380; published online: 07 June 2016; updated: 25 August 2016

In this Article, Hwa Jen Yap, Siti Zawiah Md Dawal, S. Ramesh and Sin Ye Phoon are incorrectly affiliated to ‘Graduate School of Media Design, Keio University, 4-1-1, Hiyoshi, Kohoku, Yokohama, 223-8526, Japan’. The correct affiliation is listed below:

Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.