Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.|Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.|Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.|Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.|Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.|Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.|Discovery, Merrimack Pharmaceuticals, Cambridge, Massachusetts, United States of America.