title: When should an intervention be provided?
authors.forename: Terry P
authors.initials: TP
authors.lastname: Haines
authors.forename: Steven
authors.initials: S
authors.lastname: McPhail
authors.forename: Amanda
authors.initials: A
authors.lastname: Purcell
mesh_terms: D003362:Cost-Benefit Analysis; D003657:Decision Making; D003695:Delivery of Health Care / Q000379:methods*; D004185:Disability Evaluation; D019317:Evidence-Based Medicine; D006801:Humans; D012106:Research