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Mannion, Anne F; Junge, Astrid; Elfering, Achim; Dvorak, Jiri; Porchet, François; Grob, Dieter (2009). Great expectations: really the novel predictor of outcome after spinal surgery? Spine, 34(15), pp. 1590-1599. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1097/BRS.0b013e31819fcd52
Mannion, Anne; Elfering, Achim; Staerkle, Ralph; Junge, Astrid; Grob, Dieter; Dvorak, Jiri; Jacobshagen, Nicola; Semmer, Norbert; Boos, Norbert (2007). Predictors of multidimensional outcome after spinal surgery. European spine journal, 16(6), pp. 777-786. Berlin: Springer 10.1007/s00586-006-0255-0
