Effect of bar-code technology on the safety of medication administration - Poon, EG; Keohane, CA; Yoon, CS; Ditmore, M; Barne, A; Levtzion-Korach, O; Moniz, T; Rothschild, JM; Kachalia, AB; Hayes, J; Churchill, WW; Lipsitz, S; Whitemore, AD; Bates, DW; Gandi, TK (N Engl J Med, 2010)