Confidentiality {27}
Only investigators will have access to study-related patient information. Personal information and confidentiality of data entry, coding, security, and storage are in line with the German privacy protection law (Bundesdatenschutzgesetz, BDSG) [All questionnaires completed as part of the study will be digitized, archived at Thoraxklinik after completion of the study, and retained for 10 years. For the survey, patients are given a pseudonym. Only the study director has access to the pseudonym list of respondents. Only the digitized data will be shared for analysis. These electronic data are archived after completion of the evaluation and deleted after 10 years.