Patient-centered evaluation of an expectation-focused intervention for patients undergoing heart valve surgery: a qualitative study.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EG declares that he was an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article.This work was funded by the Innovationsausschuss in the Gemeinsamer Bundesausschuss with resources of the Innovationsfonds for the promotion of new forms of care as part of the underlying INCREASE RCT (Section 92a (1) SGB V) (funding code: 01NVF19028). We acknowledge financial support from the Open Access Publication Fund of the University Medical Center Hamburg-Eppendorf and DFG – German Research Foundation. The funding sources had no involvement in the study design, the collection, analysis, and interpretation of data, in the writing of the report, and in the decision to submit the article for publication."