Clinical Evaluation of DCB-WH1 in Healing of Chronic Diabetic Foot Ulcers

Inclusion Criteria: 1. Ages 20 or older with diabetes mellitus (Type 1 or 2) who has a cutaneous ulcer on the foot and present for at least 2 weeks 2. The target ulcer is classified as a grade 1 ulcer according to a modified Wagner system, which includes wounds involving the epidermis, the dermis, the hypodermis or the subcutaneous fat but not the tendon or joint capsule. The thickness of aforesaid layers wounds be approximately between 0.2 mm and 8 mm and is ranging in size between 3 and 15 cm2 post debridement. 3. An ankle brachial index ≥0.80. 4. The study ulcer should show "infection control" as judged by the investigator 5. The subject should be free of any necrotic or infected soft and bony tissue. 6. Signed informed consent form. Exclusion Criteria: 1. Ulcers caused by venous or arterial insufficiency, osteomyelitis. 2. Poor nutritional status (albumin \< 3g/dl), poor diabetic control (HbA1c \> 10%), anemia (hemoglobin\<10 g/dL), a leukocyte counts \< 1,000/cumm. 3. Requiring prostaglandin treatment. 4. Requiring treatment with corticosteroids, immunosuppressive or chemotherapeutic agents, radiotherapy. 5. Presence of necrosis, purulence or sinus tracts that cannot be removed by debridement. 6. Presence of connective tissue disease, renal failure (\*eGFR≦30 ml/min/1.73m2), abnormal liver function (Aspartate Aminotransferase(AST), Alanine Aminotransferase(ALT)\>2.5x upper limit of normal range), malignancy. 7. vascularization surgery performed \<8 weeks before entry in the study. 8. A history of cerebrovascular events, coronary intervention (stent or coronary artery bypass graft (CABG)) or myocardial infarction, within 6 months prior to study. 9. Female patient who has a positive pregnancy test or who is breastfeeding or unwilling to use appropriate contraceptive methods during study.