Effect of botulinum toxin type A on the proliferation and collagen synthesis of human hypertrophic scar fibroblasts 
Li Wei-hua1, Li De-shui1, Gao Yu-wei2, Xing Yu-xi1
Chinese Journal of Tissue Engineering Research . 2012, (20): 3667 -3670 .  DOI: 10.3969/j.issn.1673-8225.2012.20.013