 DUBLIN, Ohio--BUSINESS WIRE--Navidea Biopharmaceuticals, Inc. NYSE American: NAVB Navidea or the Company, a company focused on the development of precision immunodiagnostic agents and immunotherapeutics, today announced the appointment Malcolm G. Witter to its Board of Directors. Mr. Witter brings decades of financial and corporate governance experience to the board. He currently serves as a corporate development leader for USI Insurance Services USI and is responsible for acquiri 