SOMERSET, N.J., Feb. 14, 2011 (GLOBE NEWSWIRE) -- inVentiv Health, Inc., a leading provider of outsourced clinical development, launch and commercialization services to the global healthcare industry, today announced that it has completed the acquisition of Campbell Alliance, a leading provider of specialized management consulting, market research and educational services to the pharmaceutical and biotech industry. Campbell Alliance founders John and Ann Campbell and members of their management team will continue to lead Campbell Alliance and maintain a significant equity-based participation in the company. Campbell Alliance will continue to operate independently.