Literature search
The systematic literature search identified 1062 records. We used an automated tool (Rayyan) to identify duplicate records in the eligibility process of this systematic review; after eliminating duplicates, 776 records remained. The records excluded after screening by title and abstract were 766, and only ten full-text articles were assessed for eligibility. Four studies without a control group and two studies where efficacy was not determined by MSCs therapy were excluded. Finally, four studies were included in this systematic review [