A Study of the Efficacy and Safety of ABH001 in the Treatment of Patients With Epidermolysis Bullosa Who Have Wounds That Are Not Healing

Inclusion Criteria:

1. The subject or legal guardian must have read, understood and signed an Institutional
Review Board/Ethics Committee (IRB/EC) approved Informed Consent or Assent Form and
must be able to and willing to follow study procedures and instructions

2. Male and female subjects.

3. Stable nutritional status.

4. Subjects with a confirmed diagnosis of generalized Epidermolysis Bullosa (EB)

5. Cutaneous wounds meeting the following criteria:

1. Anatomical location: arms, legs, thorax, or back above the waistline and below
the neck.

2. Documented age (duration) of the wound(s).

3. One or more wounds capable of potentially meeting the following wound selection
criteria at the end of the observation period:

i. Two clinically non-infected cutaneous wounds with no clinically meaningful change
in wound size during the observation period.

ii. Two matched wounds.

6. Negative urine pregnancy test for women of child-bearing potential.

7. Female subjects of childbearing potential and male subjects of procreative capacity
must agree to use an effective method of contraception.

Exclusion Criteria:

1. Pregnant or nursing women.

2. Diagnosis of non-genetic generalized EB.

3. Localized, active clinical infection of study wounds.

4. Diseases or conditions that could interfere with the assessment of safety and efficacy
of the study treatment and compliance of the subject with study visits/procedures.

5. Known allergy to bovine products.

6. Known allergy to silver products.

7. Systemic infection at the time of enrolment in the study.

8. Currently receiving or have received oral steroid therapy within the previous 4 weeks.

9. Taking, or have participated in other clinical studies involving gene therapy, stem
cell therapy, recombinant DNA/protein therapy.

10. Received ABH001, or other biologic or cell therapy for the treatment of EB in the
study wound sites within the previous 3 months.

11. Hypersensitivity to any of the therapeutic agents.

12. History of malignant skin disease.