Healing effects of Traditional Chinese Medicine plaster Heiyu Gao (黑玉膏) on refractory diabetic foot ulcers: a case series of ultra-elderly patients with surgical contraindications

ZHANG Danyu, WU Chengxiang, WU Yu, GU Jingyu

Journal of Traditional Chinese Medicine . 2026, (4): 1018 -1025 . DOI: 10.19852/j.cnki.jtcm.2026.04.021