The logo of Aastrom Biosciences Inc is seen on an incubator in a laboratory at their headquarters in Ann Arbor, Michigan November 29, 2011. Aastrom BioSciences Inc recently presented promising results from a mid-stage trial of its treatment for patients with critical limb ischemia, a disease in which blood flow to the extremities is restricted, at the American Heart Association's annual meeting. We're actually developing products now," said Tim Mayleben, chief executive of Aastrom Biosciences Inc, which is using cells derived from patients' own bone marrow to develop treatments for cardiovascular disease. Photo taken November 29, 2011. To match Insight STEMCELLS/ REUTERS/Rebecca Cook (UNITED STATES - Tags: BUSINESS SCIENCE TECHNOLOGY HEALTH LOGO)