Ethics, registration and dissemination
This study was approved by the Local Psychological Ethics Committee at the University Medical Center Hamburg-Eppendorf (authorization number: LPEK-0370). The study was prospectively registered on the German Clinical Trials Register before the enrolment of participants started (ID: DRKS00027465, 4 January 2022), and retrospectively on ClinicalTrials.gov (ID: At the beginning of the study, all attendees gave written informed consent on the study and agreed to participate in the baseline and follow-up surveys after 6, 12 and 18 months. The privacy of the participants is guaranteed by storing encrypted data. Every participant will receive a pseudo-anonymous study number. The key is only accessible to the study team and co-workers. Data and material will only be used in coded form within possible collaboration projects.The results of this study will be made available through peer-reviewed scientific journals and presentations at relevant conferences. Furthermore, a project website was launched to provide information about the current status of the project (