NEW YORK--(BUSINESS WIRE)--The 2015 Aster Awards has named Guard Dog Brand Development (www.GuardDogBD.com) a Bronze winner for the strategic design of the Corporate and Pipeline Brochure for ImmunoGen, Inc. The Aster Awards, one of the largest national competitions of its kind, is hosted by Marketing Healthcare Today Magazine and Creative Images, Inc. This elite program recognized outstanding healthcare professionals for excellence in their advertising/marketing efforts for the calendar year 2