title: The authors reply.
authors.affiliation: Norwegian Centre for Addiction Research, University of Oslo, Norway.
authors.forename: Jørgen G
authors.initials: JG
authors.lastname: Bramness
authors.affiliation: National Centre for Suicide Research and Prevention, University of Oslo, Norway Department of Psychiatry, Diakonhjemmet Hospital, Oslo, Norway.
authors.forename: Fredrik A
authors.initials: FA
authors.lastname: Walby
authors.affiliation: Department of Psychiatry, St. Olav University Hospital, Trondheim, Norway Department of Neuroscience, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Gunnar
authors.initials: G
authors.lastname: Morken
authors.affiliation: Norwegian Centre for Addiction Research, University of Oslo, Norway Department of Biostatistics, University of Oslo, Norway.
authors.forename: Jo
authors.initials: J
authors.lastname: Røislien
mesh_terms: D002423:Cause of Death; D005260:Female; D006801:Humans; D008297:Male; D015233:Models, Statistical; D012621:Seasons; D013405:Suicide / Q000706:statistics & numerical data*