Robuta

https://www.cochrane.org/hr/evidence/CD001733_pentoxifylline-treating-venous-leg-ulcers

https://www.cochrane.org/zh-hant/evidence/CD001733_pentoxifylline-treating-venous-leg-ulcers

https://www.cochrane.org/evidence/CD001273_oral-zinc-supplements-treating-leg-ulcers