References
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- http://www.ors2.state.sc.us/er.ph, Emergency Room Visit Menu: Emergency Room Hospital Discharge On-line Query System, 2004. South Carolina State Budget & Control Board Office of Research & Statistics. Received ER cost spreadsheet from DRS staff and accessed online system
- http://www.aafp.org, Time-based Coding Guidelines, 2004. American Academy of Family Physicians