1. Microelectronic Research Unit University of Oulu Oulu 90570 Finland
2. Research Unit of Health Science and Technology University of Oulu Oulu 90220 Finland
3. Department of Biotechnology and Nanomedicine SINTEF Industry Trondheim 7030 Norway
4. Instituto Nacional de Engenharia Biomédica Instituto de Investigação e Inovação em Saúde Universidade do Porto Porto 4200‐135 Portugal
5. Institute of Orthopedic Research and Biomechanics Center for Trauma Research Ulm University Medical Center Ulm 89081 Ulm Germany
6. Askel Healthcare Ltd. Helsinki 00530 Finland