We carried out a pilot study in Israel with 38 participants to assess the difficulty and clarity of the research questionnaires, as well as the participants’ willingness to answer them. The goal was to gather detailed information through personal interviews about issues related to kidney transplantation. These interviews, conducted by the researchers, yielded important insights into the research questions and helped determine the credibility and quality of the values obtained from the WTA survey. By conducting face-to-face interviews, we were able to present the participants with information in a controlled way and this enabled us to get responses to complex factors.
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