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Selfe J, Callaghan M, Witvrouw E, et al. Targeted interventions for patellofemoral pain syndrome (TIPPS): classification of clinical subgroups. BMJ Open 2013;3:e003795. Figure 1 of this article was published incorrectly. The correct figure 1 is below.
Proposed clinical sub-groups and clinical test thresholds for sub-group assignment.
