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In this book, Andrea Berger, a certified Biofeedback practitioner, describes the L.
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The inventor of the system, Chris Keser, is a veteran homeopath who has worked with energy medicine and Biofeedback since the 1970\'s.
It is also registered in the United States, Australia, and South Africa as a Biofeedback device. is an advanced electro-physiological Biofeedback device, which has been rigorously tested and CE-certified throughout the European Union as a Class 2A medical instrument.
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