Declarations of conflict of interest must be submitted transparently in accordance with author disclosure standards. Authors are required to disclose any relationships, whether financial or personal, that have the potential to introduce bias or partiality within their manuscript. The funding sources for the research must be specifically explained along with details of the funder's role. If the funding provider (sponsor) had no specific role, the authors must state this clearly. Authors must also guarantee that they have full access to all research data and that the sponsor did not interfere with data processing or manuscript preparation. If no such conditions exist, authors may include the following statement: "The authors declare no conflict of interest."