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Article History

Received: 15 November 2024

Accepted: 11 May 2025

First Online: 28 May 2025

Declarations

:

: The Medical Ethical Committee of the Leiden University Medical Center in the Netherlands approved the protocol of the study (decision reference number N20.137). The team adhered to the requirements for privacy and confidentiality as listed in the Privacy Statement of the Leiden University Medical Center as well as the GDPR. All intervention group participants provided electronic informed consent for the questionnaires and retrieval of data from SineFuma, using Castor. Trainers participating in the interviews also provided their Informed consent. For both control groups, SineFuma provided data in such a way, that it was not traceable to the individual participants. Everyone attending SCC group training with SineFuma had agreed to their data being used for research purposes as long as the data cannot be traced back to the individual. In Castor, data was pseudonymized and could only be accessed by authorized research personnel working on this study. All data was saved securely on the Research Memory of the Cardiology Department of the Leiden University Medical Center and will be saved for 15 years as legally required.

: Not applicable.

: The authors declare no competing interests.