6Kottmerier PK.Appendicitis.In:Welch KJ,Randolph JG,Ravitch MM.(eds)Pediatric Surgery.4th ed.Chicago.Year Book Medical Publishers.1986.991-992
7Bolton JP,Craven ER,Croft RJ,et al.An assessment of the value of the white cell count in the management of suspected acute appendicitis.Br J Surg,1975,62:906-908
8Marc SL,Michelle C,Marina C,et al.Selective use of ultraso-nography for acute appendicitis in children.Am J Surg,1999,177:193-196