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Knee arthroscopy and exercise versus exercise only for chronic patellofemoral pain syndrome: a randomized controlled trial

Jyrki A Kettunen*, Arsi Harilainen, Jerker Sandelin, Dietrich Schlenzka, Kalevi Hietaniemi, Seppo Seitsalo, Antti Malmivaara and Urho M Kujala

BMC Medicine 2007, 5:38 doi:10.1186/1741-7015-5-38

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