Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;
Investigation performed at the Department of Surgery,University of Michigan Health Systems,Ann Arbor,Michigan;