systematic review writing

Hi, I am looking for a knowledgeable and experienced freelancer to write up a systematic review for publishing. I'm getting alot of conflicting feedback and I need to get this published. The research has already been done and I'm just trying to get it to an acceptable standard to publish. Attached is my version so far. The writing should follow the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) structure.