- Anterior knee pain. PatientPlus. patient.info/patientplus, last checked 23 June 2015
- Patellofemoral pain syndrome. OrthoInfo. American Academy of Orthopaedic Surgeons. orthoinfo.aaos.org, last reviewed February 2015
- Anterior knee pain. Brukner & Khan’s Clinical Sports Medicine (5th ed, online). McGraw-Hill Medical. csm.mhmedical.com, published 2017
- Patellofemoral pain syndrome. BMJ Best Practice. bestpractice.bmj.com, last updated November 2017
- Knee pain – assessment. NICE Clinical Knowledge Summaries. cks.nice.org.uk, last revised August 2017
- Sprains and strains. NICE Clinical Knowledge Summaries. cks.nice.org.uk, published March 2016
Reviewed by Pippa Coulter, Freelance Health Editor, April 2018
Expert reviewer Elisabeth Morgans, Bupa Physiotherapist
Next review due April 2021
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