Developing rights-based standards for children having tests, treatments, examinations and interventions: using a collaborative, multi-phased, multi-method and multi-stakeholder approach to build consensus.

"Declarations Ethical approvalThis study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of Edge Hill University, UK (ETH2021-0261), Federation University, Australia (A21-157), Brazil (CAAE 53331321.5.0000.5411 and Opinion No 5.159.191), Spain (review was not deemed necessary by the research institute’s ethics committee as this project did not entail any direct medical intervention to children) and Sweden (Swedish Ethical Review Authority 2022-01380-01). Informed consentInformed consent was obtained from all individual participants included in phase 3 of the study. For the children and young people involved in the research element (Phase 3) informed consent was obtained from the parents by them ticking a box on the survey before allowing their child to enter their views. Conflict of interest  The authors have no relevant financial or non-financial interests to disclose. Conflict of interest  The authors have no relevant financial or non-financial interests to disclose."