Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Healing
[57]	71 people Data from 1 RCT	Healing rates 12/35 (36%) with platelet-derived growth factor 12/36 (34%) with placebo	Significance not assessed
[57]	64 people Data from 1 RCT	Healing rates 18/32 (56%) with platelet-derived growth factor 14/32 (44%) with placebo	Significance not assessed