title: Response to Paul Regal.
authors.affiliation: Department of Geriatric Medicine, Oslo University Hospital, Oslo, Norway.
authors.forename: Leiv Otto
authors.initials: LO
authors.lastname: Watne
authors.forename: Torgeir
authors.initials: T
authors.lastname: Wyller
authors.forename: Roanna
authors.initials: R
authors.lastname: Hall
authors.forename: Alasdair
authors.initials: A
authors.lastname: MacLullich
mesh_terms: D018680:Cholinergic Antagonists / Q000097:blood* / Q000134:cerebrospinal fluid*; D003693:Delirium / Q000175:diagnosis* / Q000209:etiology*; D005260:Female; D006620:Hip Fractures / Q000150:complications*; D006801:Humans; D008297:Male
chemical_list: D018680:Cholinergic Antagonists