4Mac Gabhann L. A comparison of two depot injection tech niques[J]. Nurs-ing Standard,1998,12(37) :39-41.
5Diggle L, Deeks J. Effect of needle length on incidence of local reactionsto routine immunisation in infants aged 4 months: Randomised controlledtrial[J]. BMJ, 2000,321 : 931 - 933.