CLINICAL ASSESSMENT Patients are clinically tested at baseline (T0), just after intervention (T1) and at 6 months or more after intervention (T2). One trained physical therapist, the same for all patients, performs all outcome assessments (pretreatment as well as posttreatment and follow up) with the supervision of the patient's referent physician, who can double check the clinical tests results even consulting the videos of the patients. To minimize biases during post-treatment evaluation, he cannot have access and view the results of previous sessions.