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For enquiries related to the Declaration of Sydney, its ethical principles, custodianship, or appropriate use, please contact the Custodian Group.

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The Custodian Group aims to respond to legitimate enquiries within a reasonable timeframe. Due to the voluntary nature of custodianship, immediate responses cannot be guaranteed. However, we try our best to respond to your queries in a timely manner.

The Declaration of Sydney is a shared ethical reference. Engagement is welcomed where it supports responsible innovation and public trust.

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The Declaration of Sydney is a non-regulatory ethical reference. It does not replace clinical judgment, professional standards, or legal obligations. The Declaration serves to guide responsible innovation in neurosurgery.