1 CHALMERS - University of Technology, Dept. of Mechanics and Maritime Sciences (M2), SAFER - Lindholmspiren 3, floor 2, 417 56 Göteborg, Sweden. Electronic address: marco.dozza@chalmers.se.
2 Department of Mechanical and Aerospace Engineering, University of California Davis, Davis, CA 95616, United States. Electronic address: mhubbard@ucdavis.edu.
3 BioMechanical Engineering, Delft University of Technology, Mekelweg 2, NL 2628, CD, Delft, the Netherlands. Electronic address: a.l.schwab@tudelft.nl.