1Zielke A, Sitter H, Rampp T, et al. Clinical decision-making, ultrasonography, and scores for evaluation of suspected acute appendicitis. Word J Surg, 2001, 25: 578-584.
2James A, Marc I, Jay L, et al. Pediatric surgery. Appendicitis 93:1369,1998.
3Malik AA, Wani NA. Continuing diagnostic challenge of acute appendicitis: Evaluation through modified Alvarado score. Aust N Z J Surg, 1999, 69: 821-822.
4Alvarado A. A practical score for the early diagnosis of acute appendicitis. Ann Emerg Med, 1986, 15:557-564.