Krane E, Zempsky WT, Bean-Lijewski J, Finkel B, Finkel J, Hammer G, Kauffman RE, Koh JL, Malviya SV, Rodarte A, Rose JB, Rossberg M, Sarkis E, Schmitz ML, Sher LD, Gennevois DJ, Leong MS. Efficacy and safety of needlefree powder lidocaine delivery system in pediatric patients undergoing venipuncture or peripheral venous cannulation: The randomized double-blind COMFORT-003 and -004 trials. Anesthesiology. 2008.