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Diffusion Pharmaceuticals (NASDAQ:DFFN) A $61 Billion ... If cutting-edge technology, innovative product pipelines and billion-dollar markets excite you, then take a close look at this Biotech pioneer. Our research and due diligence has discovered Diffusion Pharmaceuticals Inc. (NASDAQ: DFFN), a clinical-stage biotechnology firm that offers a revolutionary approach to the treatment of life-threatening diseases caused by cellular oxygen deprivation