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Haefeli, Mathias; Elfering, Achim; McIntosh, Emma; Gray, Alastair; Sukthankar, Atul; Boss, Norbert (2008). A Cost-Benefit Analysis Using Contingent Valuation Techniques: A Feasibility Study in Spinal Surgery. Value in health, 11(4), pp. 575-588. New York, N.Y.: Elsevier 10.1111/j.1524-4733.2007.00282.x
