title: Authors' response.
authors.affiliation: Kongsberg, Norway Linköping, Sweden Kongsberg, Norway.
authors.forename: Hanne-Mari Schiøtz
authors.initials: HM
authors.lastname: Thorud
authors.forename: Magne
authors.initials: M
authors.lastname: Helland
authors.forename: Arne
authors.initials: A
authors.lastname: Aarås
authors.forename: Tor Martin
authors.initials: TM
authors.lastname: Kvikstad
authors.forename: Lars Göran
authors.initials: LG
authors.lastname: Lindberg
authors.forename: Gunnar
authors.initials: G
authors.lastname: Horgen
mesh_terms: D005152:Facial Muscles / Q000098:blood supply*; D005260:Female; D006801:Humans; D008297:Male; D009801:Oculomotor Muscles / Q000098:blood supply*; D017156:Photoplethysmography / Q000379:methods*