[3]Milgrom C，Finestone A，Eldad A，et al. Patellofemoral pain caused by overactivity. A prospective study of risk factors in infantry recruits[J]. Journal of Bone & Joint Surgery American Volume，1991，73(7)：1041-1043.

    [4]Collins NJ，Bierma-Zeinstra SM，Crossley KM，et al. Prognostic factors for patellofemoral pain：A multicentre observational analysis[J]. British Journal of Sports Medicine ......