Northwest Biotherapeutics has expanded its senior management team with the addition of Dr. Kevin T. Duffy as vice president, Medical Affairs and External Collaborations. Dr. Duffy joins the company from Merck, where he served as Research Scientific Director in the Keytruda program during the last five years.  Dr. Duffy’s roles included scientific support and outreach to health care providers and national and regional scientific leaders in over 20 different solid tumors and hematologic m...