title: Commentary: DAGs and the restricted potential outcomes approach are tools, not theories of causation.
authors.affiliation: Department of Public Health, University of Otago, Wellington, New Zealand.|School of Population and Global Health, University of Melbourne, Parkville, VIC, Australia.
authors.forename: Tony
authors.initials: T
authors.lastname: Blakely
authors.affiliation: School of Population Health, University of Adelaide, Adelaide, SA, Australia.
authors.forename: John
authors.initials: J
authors.lastname: Lynch
authors.affiliation: School of Population and Global Health, University of Melbourne, Parkville, VIC, Australia.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Bentley