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Publications Over 45 Years . css1nef2s2displayblockbackgroundlineargradient135deg 9E2C7C 378FD2webkitbackgroundcliptextbackgroundcliptextwebkittextfillcolortransparentPioneering Research Dean Ornish M. D. and his colleagues at the nonprofit Preventive Medicine Research Institute in collaboration with Harvard Medical School the University of California San Francisco and other leading academic institutions have conducted a series of research studies scientifically proven in peerreviewed randomized trials to prevent and often even reverse the progression of the most common and costly chronic diseases such as heart disease.