Gabor Maté

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Julie Holland

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Rick Doblin

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Ralph Metzner

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Charles Grob

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David Healy

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David E. Nichols

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David Nutt

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Dennis J. McKenna

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Gillian Maxwell

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Ingrid Pacey

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Jeremy Narby

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Kathleen Harrison

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Manuel Schoch

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Michael James Winkelman

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Michael Mithoefer

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Roland Griffiths

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Stanislav Grof

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Stephen Ross

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Wade Davis

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William Richards

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Amanda Feilding

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Chris Bennett

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