Treatment of Oral Chronic Graft-versus-host Disease With Human Umbilical Cord Mesenchymal Stem Cell Dressing

Exclusion Criteria

• •1. Have severe heart, kidney or liver dysfunction.
• •2. Those combined with other malignant tumors need treatment.
• •3. There are clinical symptoms of brain dysfunction or severe mental illness and the inability to understand or follow the research protocot4. Patients who cannot be guaranteed to complete the necessary treatment plan and follow-up observation.
• •5\. Patients with severe acute allergic reactions. 6. Clinically uncontrolled active infection. 7. Patients who are participating in other clinical trials. 8. Researchers believe that the subject is not suitable for clinical trials for other reasons.