WITHDRAWN: Exercise therapy for patellofemoral pain syndrome.

The review was withdrawn, as of Issue 1, 2015, because it has been superceded by a new Cochrane review: van der Heijden RA, Lankhorst NE, van Linschoten R, Bierma‐Zeinstra SMA, van Middelkoop M. Exercise for treating patellofemoral pain syndrome. Cochrane Database of Systematic Reviews 2015, Issue 1. Art. No.: CD010387. DOI: 10.1002/14651858.CD010387.pub2. The editorial group responsible for this previously published document have withdrawn it from publication.