IRVINE, Calif., March 1, 2017 /Weed Wire/ — Cannabis Science, Inc. (OTC PINK: CBIS), a U.S. company specializing in the development of cannabis-based medicines, is pleased to announce that its President, CEO and Co-Founder, Raymond C. Dabney, will be a keynote speaker and panelist at the Global Health Catalyst (GHC) Summit at Harvard Medical School on April 28-30, 2017.