2.8. Procedure of Data Collection
MAY
During enrolment into the study, the participants were asked to give written informed consent and to provide their email addresses so that they could be contacted for further surveys. In the next step, the participants were directed to the fact box and the corresponding questionnaire (implemented in LimesurveyThe fact boxes survey was opened on 28 May 2020 and closed on 25 January 2021. No reminder letters were sent. No expense allowances were paid.