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APA Citation
Janssen, J., Dey, P., Callaghan, M., Witvrouw, E., Richards, J., Sutton, C., Stokes, M., Martin, D., Dixon, J., Hogarth, R., Baltzopoulos, V., Ritchie, E., Arden, N., Turner, D., Masters, R., Polman, R., & Selfe, J. (n.d.). targeted intervention for patellofemoral pain (TIPPS): psychosocial characteristics of clinical subgroups. Physiotherapy, 101, e669–e670. http://access.bl.uk/ark:/81055/vdc_100050955081.0x000047