1. Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria.
2. Christian Doppler Laboratory for Restoration of Extremity Function, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria.
3. Department of Bioengineering, Royal School of Mines, Imperial College London, South Kensington Campus, Kensington, London SW7 2AZ, UK.
4. Otto Bock Healthcare Products GmbH, Brehmstraße 16, A-1110 Vienna, Austria.
5. Alfred Mann Foundation, 25134 Rye Canyon Loop #200, Valencia, CA 91355, USA.
6. Deanery of Clinical Sciences, The University of Edinburgh, Scotland, UK.
7. Department of Plastic & Reconstructive Surgery, NHS Lothian, Scotland, UK.
8. Department of Physical Medicine and Rehabilitation, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria.