Data collection
The data from this study were collected between November 1st and December 31st in 2021. We used the online platform Qualtrics for the distribution of the surveys within the three different media outlets. The surveys were filled out by participants who were recruited from three different media outlets, a Dutch newspaper (called AD), Facebook (FB) and a local Indian radio station (Ujala). The total number of potential participants who clicked on the survey link, read the information sheet, and were age eligible (18 years or older) comprised 4577 participants, including 2692 participants from the Dutch newspaper, 1695 participants from FB, and 190 participants from the local Indian radio station. Participants were asked to sign an informed consent form, before participating in our campaign study. If participants did not provide informed consent, they were excluded from participation. Participants were also excluded from this study if aged < 18 years or if they did not complete the survey. In total, 1226 participants met our study criteria and were included in the campaign study. No compensation or incentives were provided to promote research participation. This study was reviewed by the Medical Ethical Review Board (METC) of the Amsterdam University Medical Center (UMC), the Netherlands, and was exempted from the need for an IRB approval. Furthermore, this study was performed in accordance with the Declaration of Helsinki, followed the CONSORT 2010 guidelines for reporting randomized trials, and was registered at ISRCTN under reference number ISRCTN13441058.