1. Pediatric Health Information System (PHIS) is a comprehensive data set of 36 free-standing children's hospitals across the country.
2. Growth trends: a focused analysis of children's hospitals,2001
3. AHA hospital statistics,;American Hospital Association,1996
4. Without coverage: immigration's impact on the size and growth of the population lacking health insurance;Center for Immigration Studies,2001
5. Children's Hospital Decision Support Analysis,2002