1. Implementing syndromic surveillance: a practical guide informed by the early experience;Mandl;J Am Med Inform Assoc,2004
2. Framework for evaluating public health surveillance systems for early detection of outbreaks: recommendations from the CDC Working Group;Buehler;MMWR Recomm Rep,2004
3. Updated guidelines for evaluating public health surveillance systems: recommendations from the guidelines working group;Centers for Disease Control and Prevention;MMWR,2001
4. ICD-9-CM 2002: International Classification of Diseases, 9th Revision;American Medical Association,2002
5. Use of emergency department chief complaint and diagnostic codes for identifying respiratory illness in a pediatric population;Beitel;Pediatr Emerg Care,2004