1. Are there three main subgroups within the patellofemoral pain population? A detailed characterisation study of 127 patients to help develop targeted intervention (TIPPs). Issue 14 (1st February 2016) Authors: Selfe, James; Janssen, Jessie; Callaghan, Michael; Witvrouw, Erik; Sutton, Chris; Richards, Jim; Stokes, Maria; Martin, Denis; Dixon, John; Hogarth, Russell; Baltzopoulos, Vasilios; Ritchie, Elizabeth; Arden, Nigel; Dey, Paola Journal: British journal of sports medicine Issue: Volume 50:Issue 14(2016) Page Start: 873 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗