title: Leapfrog leg.
authors: C L
authors: CL
authors: Saltzman
authors: P A
authors: PA
authors: Kolowich
authors: G A
authors: GA
authors: O'Connor
mesh_terms: D001265:Athletic Injuries / Q000209:etiology*; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000209:etiology*; D008023:Ligaments, Articular / Q000293:injuries*