Stratatech is moving forward with tests of a genetically engineered human skin that could heal the sores and wounds many diabetic patients get on their feet. Madison, WI-based Stratatech, a subsidiary of U.K.-based Mallinckrodt (NYSE: MNK), said Wednesday that it had enrolled the first patient in a study of the skin tissue, called ExpressGraft-C9T1. Stratatech [...]