... 5Research Medication errors: a prospective cohort study of hand-written and computerised physician order entry in the intensive care unitRob Shulman1, Mervyn Singer2, John Goldstone3 and ... criticallyrevising the draft. JG made substantial contributions to the data analysis. GB was substantially involved in the analysis,interpretation and drafting the manuscript.AcknowledgementsTo the Medical ... cases,nurses administered medication without a legally valid physi-cian order. Although an absent 'signature' with CPOE wasregarded as an error, the audit facility of the Clinical Informa-tion...