Hip and knee strength is not affected in 12-16 year old adolescents with patellofemoral pain--a cross-sectional population-based study.
PLoS One. 2013 Nov 13;8(11):e79153. doi: 10.1371/journal.pone.0079153. eCollection 2013.
PLoS One. 2013.
PMID: 24236101
Free PMC article.