Research progress on and molecular mechanism of vacuum sealing drainage in the treatment of diabetic foot ulcers.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article.This work was supported by grants from the National Natural Science Foundation of China (No. 81972947), the Key Research and Development Program of Shandong Province of China (No. 2019GSF108128), the Shandong Province Natural Science Foundation (Major Basic Research Program) (No. ZR2019ZD38), the Academic Promotion Program of Shandong First Medical University (No. 2019LJ005), and the Social Science Planning and Research Project of Shandong Province (No. 21CTQJ08)."