Exclusion criteria
ORAL ULCERS, PERIODONTAL DISEASES, MALIGNANT TUMORS, OTHER INFECTIOUS DISEASES, DISEASES
Patients were excluded from this study if they (1) had active periodontal diseases that required treatment and refractory oral ulcers prior to this study; (2) were pregnant and lactating; (3) presented with other malignant tumors; (4) had other infectious diseases; or (5) had severe heart, brain, lung, liver, kidney, or other diseases that prevented them from tolerating chemotherapy.