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[Correspondence] Frailty in emergency departments

Population ageing is placing a heavy demand on health-care systems worldwide. This pressure is being particularly felt by hospital emergency departments, which are facing an unprecedented influx of older patients (65 years and older).1 Of concern, more than half of these older patients are likely to be frail.2 Frailty signifies an increased vulnerability to external stressors and has been purported to be the largest global problem associated with an ageing population.3