1. Department of Orthopaedic Surgery Hospital San Jose Santiago Chile
2. Department of Orthopaedic Surgery Hospital Clínico Universidad de Chile Santiago Chile
3. Centre of Haemophilia and Studies of Congenital Coagulopathies Roberto del Rio Children's Hospital Santiago Chile
4. Department of Physical Therapy Faculty of Medicine University of Chile Santiago Chile
5. Biomechanics and Kinesiology Laboratory Service of Physical Therapy San José Hospital Santiago Chile