Michael A. Metzger has been appointed president and chief operating officer at Regado Biosciences, and joins the executive management team. Mr. Metzger will oversee corporate and business development strategy and planning, as well as other key business functions of the company.    Mr. Metzger has 20 years of experience in the life sciences sector. He previously served as executive vice president and chief operating officer at Mersana Therapeutics, where he drove the establishment and management ...