To what extend strengthening of hip abductor and lateral rotator affect the treatment of patellofemoral pain syndrome (PFPS)?

To what extend strengthening of hip abductor and lateral rotator affect the treatment of patellofemoral pain syndrome (PFPS)? SYSTEMATIC REVIEW Research protocol Introduction: about patellofemoral pain syndrome (PFPS)   Objective: Summary of existing review. Identify search procedure. Preliminary search. Protocol development light of preliminary search. Databases key words: Key words Population   Intervention Comparator Outcomes Design Source of material: (1) Internet search (2) Other sources Eligibility criteria: (you can find 10 studies in the attached files) Inclusion criteria Exclusion criteria rationale Population Intervention   Comparator Outcomes Design The outcome measurement: (1)Anterior Knee Pain Scale (AKPS). Summary of the scale. Are reliable, valid and responsive in patients with PFPS? (2)visual analogue scale (VAS) Summary of the scale. Are reliable, valid and responsive in patients with PFPS? Quality appraisal studies. PRISMA ( you can find about this reference in the attached files). Write it as a summary