Muscle activity and rehabilitation in spinal stenosis (MARSS) after conservative therapy and surgical decompression with or without fusion: Protocol for a partially randomized pati... oleh Eduard Kurz, Philipp Schenk, Florian Brakopp, Moritz Diers, Oliver Klingel, Stefan Bone, Hans Jörg Meisel, Karl-Stefan Delank, Bernhard W. Ullrich