Open Access Study protocol

Comparison of standard fusion with a "topping off" system in lumbar spine surgery: a protocol for a randomized controlled trial

Jan Siewe*, Christina Otto, Peter Knoell, Marco Koriller, Gregor Stein, Thomas Kaulhausen, Peer Eysel, Kourosh Zarghooni, Jeremy Franklin and Rolf Sobottke

BMC Musculoskeletal Disorders 2011, 12:239 doi:10.1186/1471-2474-12-239

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