SAN FRANCISCO--(BUSINESS WIRE)--Cannabis Science Inc. (NASD OTCBB: CBIS), an emerging pharmaceutical cannabis company, is pleased to announce the appointment of Dr. Mary J. Ruwart as Vice President of Research & Development. Dr. Ruwarts previously held the position of Senior Research Scientist at Upjohn Inc., which ultimately merged with Pfizer (NYSE: PFE) to become a part of one of the largest Pharmaceutical Companies in the world.
