“…A statement that PRISMA or similar reporting guidelines had been followed were present in 61 (89.7%) of the published studies 79,81–100,103–109,112,116,118,124,134,137–140 . Refs 8,113–115,117,119–122,125–128,130–133,135,136,141–144 . All but one 84 of the 57 registered studies had the review question stated in the associated registration.…”