1. Center for Medical Physics and Biomedical Engineering; Medical University of Vienna; Vienna Austria
2. Escuela de Ingeniería y Ciencias; Tecnológico de Monterrey; Monterrey NL Mexico
3. Health Technology Center; Reykjavik University / Landspitali-University Hospital; Reykjavik Iceland
4. Ludwig Boltzmann Institute of Electrical Stimulation and Physical Rehabilitation; Vienna Austria
5. Department of Physical Medicine and Rehabilitation; Wilhelminenspital; Vienna Austria