The study site was a larg e, urban, not for-profit, university-affiliated teaching hospital in Seoul with approximately 2000
operational beds. In the 2004 fiscal year, the hospital installed a locally developed complete EHR system for inpatient and
outpatient units. All clinicians at the hospital used the EHR,which at the time of the study included computerized physi-cian order entry, nursing records, and laboratory and radiology results.