ST. LOUIS--(BUSINESS WIRE)--Pharsight, a market-leading provider of software and scientific consulting services to improve productivity and decision-making in clinical drug development, announced today that Tobira Therapeutics Inc., a biopharmaceutical company focused on developing and commercializing innovative products for the treatment of HIV disease, has selected PKS Online™ to support study analysis, data management, and reporting for its promising lead drug candidate, Cenicriviroc.