Stem cell injections in knee osteoarthritis: a systematic review of the literature.

Objective: Stem cell injection for knee osteoarthritis (KOA) is an emerging new therapy, and we aimed to review its evidence of efficacy.

Design: Systematic review.

Eligibility Criteria: Criteria for eligibility were randomised controlled trials (RCTs) and non-RCT on the efficacy of stem cell injections in KOA.