Article-level statement
Every research article states where data, materials, protocols, and analysis code can be accessed, with persistent identifiers where available. Explain access conditions, restrictions, and the process for requesting controlled access.
Appropriate restrictions
Do not expose identifiable patient information. Restrictions may arise from consent, ethics approvals, contracts, or applicable law. Explain a restriction specifically; avoid unsupported promises that all data are available on request. State when no new data were generated.