The effect of the anticholinergic burden on duration and severity of delirium in older hip‐surgery patients with and without haloperidol prophylaxis: A post hoc analysis oleh Monique P. H. Tillemans, Madelon H. Butterhoff‐Terlingen, Rutger Stuffken, Ralph Vreeswijk, Toine C. G. Egberts, Kees J. Kalisvaart