1. BioDesign Lab, School of Engineering, Computer and Mathematical Sciences, Auckland University of Technology, Auckland 1010, New Zealand
2. Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
3. Center for Sensory-Motor Interaction, Department of Health Science and Technology, Aalborg University, 9220 Aalborg Øst, Denmark
4. Ambient Cognition Limited, Auckland 1010, New Zealand