Functional improvement after unicompartmental knee replacement: a follow-up study with a performance based knee test.
Knee Surg Sports Traumatol Arthrosc 2007 Oct 23;15(10):1187-93. Epub 2007 Jun 23.
Department of Orthopaedic Surgery and Traumatology, Atrium Medical Centre, PO Box 4446, 6401 CX Heerlen, and Department of Methodology and Statistics, Maastricht University, The Netherlands.