Brief lifestyle advice in cardiac care: an experimental study on message source and framing.

"Declarations Conflict of interestR.V.H. IJzerman, R. van der Vaart, L.D. Breeman, I. van den Broek, M. Keesman, R.A. Kraaijenhagen, T. Reijnders, M. Weerts, A.W.M. Evers, W.J.M. Scholte op Reimer and V.R. Janssen declare that they have no competing interests. Ethical standardsApproval for this study was obtained from the Psychology Research Ethics Committee of Leiden University, the Netherlands (reference number: 2020-06-05‑A.W.M. Evers-V1-2474). All procedures performed were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Patient consent: Informed consent was obtained from all participants before taking part in the online experimental study. Public and patient involvement: Cardiac patients and an employee of Harteraad, the Dutch patient association for CVD, were asked to provide feedback during the development of the survey’s content and design. All those involved also conducted one or more pilot tests. Conflict of interest R.V.H. IJzerman, R. van der Vaart, L.D. Breeman, I. van den Broek, M. Keesman, R.A. Kraaijenhagen, T. Reijnders, M. Weerts, A.W.M. Evers, W.J.M. Scholte op Reimer and V.R. Janssen declare that they have no competing interests."

"Funding This work was supported by the Netherlands Cardiovascular Research Initiative: An Initiative with the support of the Dutch Heart Foundation (CVON2016-12 BENEFIT), ZonMw (The Netherlands Organization for Health Research and Development), and members of the BENEFIT consortium."