Pfizer Inc. has unveiled the establishment of the Pfizer Breakthrough Growth Initiative, through which Pfizer will invest up to $500 million in biotechnology companies to help provide funding and access to Pfizer’s scientific expertise to ensure continuity of the biotechnology companies’ most promising clinical development programs.   “There has never been a more important moment to pursue new collaborations in our industry,” said John Young, chief business officer, Pfizer. “The Pfizer Bre...