BMJ Publishing Group, Annals of the Rheumatic Diseases, 11(64), p. 1650-1652, 2005
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Methods: 120 patients participating in a randomised trial comparing 3 weeks' treatment in a spa resort in Austria or in the Netherlands with a control group completed a WTP questionnaire before and after spa treatment. Patients indicated on a payment card the maximal co-payment they wanted to contribute for three scenarios that included (a) two levels of improvement in pain and stiffness and (b) two treatment environments: a rehabilitation hospital and a spa resort.