1. Department of Environmental Physiology; School of Technology and Health; Royal Institute of Technology; Stockholm; Sweden
2. Department of Sport Medicine and Biology of Physical Activity; Faculty of Physical Education and Sport Science; National and Kapodistrian University of Athens; Daphne; Greece
3. Department of Automation, Biocybernetics and Robotics; Jozef Stefan Institute; Ljubljana; Slovenia
4. Human Performance-Rehabilitation Laboratory; Faculty of Physical and Cultural Education; Evelpidon Hellenic Military University; Vari; Greece