Errors in the administration of parenteral drugs in intensive care units: multinational prospective study. - Valentin A; Capuzzo M; Guidet B; Moreno R; Metnitz B; Bauer P; Metnitz P; European Society of Intensive Care Medicine. Research Group on Quality Improvement; Sentinel Events Evaluation Study Investigators (BMJ: British Medical Journal (Overseas & Retired Doctors Edition), 2009)