2.1.3. Ethics

The survey instrument was constructed based on the literature review. Literaturedriven questions were slightly changed for this study. All questions were confirmed by the research team and by two experts from CortenMedic—a healthcare service provider. Detailed information on the purpose of the research and its course was prepared for respondents. During the first stage of the survey, an interviewer read the study rules out to the respondents. The survey was voluntary and completely anonymous. Only adult respondents took part in the survey. Each patient could withdraw from the study at any time or choose not answer all the questions. The completion of a single questionnaire required 20 min on average. The interviewer read all the questions and answers and marked the patients' responses in the database form one by one. The questionnaire form was anonymous. Patients completed the questionnaire voluntarily. The questionnaire was assessed from an ethical perspective by the Warsaw University of Technology Senate Committee for Professional Ethics.
