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cobi12197-sup-0001-Suppmat.docx94KThe questionnaire used (Appendix 1), description of the choice experiment design and contingent valuation question (Appendix 2), analysis of the choice experiment (Appendix 3), and details of the comparison between the results of the choice experiment and the contingent valuation WTA question (Appendix 4) are available online. The authors are solely responsible for the content of this material. Queries (other than absence of the material) should be directed to the corresponding author.

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