<style face="normal" font="default" size="100%">The burden and risk factors for adverse drug events in older patients--a prospective cross-sectional study.</style>

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0<style face="normal" font="default" size="100%">The burden and risk factors for adverse drug events in older patients--a prospective cross-sectional study.</style><style face="normal" font="default" size="100%">The burden and risk factors for adverse drug events in older patients--a prospective cross-sectional study.</style>