title: Variables affecting outcomes in critical care trials: is prone positioning research exempt from these factors?
authors.forename: Carlos L
authors.initials: CL
authors.lastname: Alviar
authors.forename: Juan P
authors.initials: JP
authors.lastname: Cordova
authors.forename: Aleksandr
authors.initials: A
authors.lastname: Korniyenko
authors.forename: Ethan D
authors.initials: ED
authors.lastname: Fried
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods*; D003422:Critical Care / Q000379:methods*; D006801:Humans; D007362:Intensive Care Units; D007440:Intubation; D016684:Prone Position; D012107:Research Design