[1]IRCCS, Istituto Ortopedico Galeazzi, Milano, Italy;
[2]4MAT, Universite Libre de Bruxelles, Bruxelles, Belgium;
[3]KU Leuven, Biomeehanics Section, Leuven, Belgium;
[4]Smith&Nephew, Zaventem, Belgium;
[5]BEAMS Department, Universite Libre de Bruxelles, Bruxelles, Belgium;