1. Swiss Federal Institute of Technology Lausanne, Microengineering Institute, Laboratory of Applied Photonics Devices, Station 17, Lausanne 1015, SwitzerlandbSwiss Federal Institute of Technology Lausanne, Institute of Bioengineering, Laboratory of Biomecha
2. Swiss Federal Institute of Technology Lausanne, Institute of Bioengineering, Laboratory of Biomechanical Orthopedics, Station 19, Lausanne 1015, SwitzerlandcSwiss Federal Institute of Technology Lausanne, Institute of Materials, Laboratory of Polymer and
3. Clinic Cecil, Neuro-orthopedic Spine Unit, Avenue Louis-Ruchonnet 53, Lausanne 1003, Switzerland
4. Swiss Federal Institute of Technology Lausanne, Institute of Materials, Laboratory of Polymer and Composite Technology, Station 12, Lausanne 1015, Switzerland
5. Swiss Federal Institute of Technology Lausanne, Institute of Bioengineering, Laboratory of Biomechanical Orthopedics, Station 19, Lausanne 1015, Switzerland
6. Swiss Federal Institute of Technology Lausanne, Microengineering Institute, Laboratory of Applied Photonics Devices, Station 17, Lausanne 1015, Switzerland