title: Is one trial enough?
authors.forename: R
authors.initials: R
authors.lastname: Wormald
mesh_terms: D000772:Anesthesia, Local / Q000379:methods*; D002387:Cataract Extraction; D019317:Evidence-Based Medicine / Q000379:methods; D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design