title: Response letter to Martínez-Velilla and Zekry.
authors.affiliation: Geriatrics Section, Department of Internal Medicine, Academic Medical Center, Amsterdam, the Netherlands.
authors.forename: Wijnanda J
authors.initials: WJ
authors.lastname: Frenkel
authors.forename: Erika J
authors.initials: EJ
authors.lastname: Jongerius
authors.forename: Sophia E J A
authors.initials: SE
authors.lastname: de Rooij
mesh_terms: D000203:Activities of Daily Living; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D018570:Risk Assessment / Q000379:methods*