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Corrections

If something on this site or in a book is wrong, we want to know. Include the page or the chapter and what you think is wrong — a specific sentence helps more than a general impression.

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The app

Questions about the companion app belong with the app itself; it is at Resonance.

What we cannot help with

We cannot give medical advice, interpret symptoms, or tell you whether a device is right for a condition. Those are questions for a doctor, and no book or website is a substitute for one.