 5. Designated foot ulcer meets the following criteria at both the screening an baseline visits. If the patient has multiple ulcers, at least one ulcer must meet the following criteria at both the screening and baseline visits: a Present for at least 4 weeks; b Full-thickness cutaneous ulcer below the ankle surface; c University of Texas grade A1; d Area after debridement 4 square cm; e Viable, granulating wound investigator discretion 