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Choose whether to allow optional measurement of your Forum visits.
Optional measurement
You can use the Forum without consenting. You can change or withdraw your choice on this page.
Read the measurement privacy notice
If you agree, the Forum uses random browser and session identifiers to measure visits and usage. This measurement does not use fingerprinting, IP addresses or clinical content and has no advertising purpose. The browser identifier lasts 30 days and the session expires after 30 minutes of inactivity; you can withdraw your choice. Without consent you can use the service: necessary operational events and visits are measured: in aggregate form if you are not signed in, linked to your account if you are. Unmeasurable browsers and sessions remain marked as unavailable.