REFERENCES
- Abrams , B , Anderson , H and Blackmore , C . 2013 . Investigating suspected cancer clusters and responding to community concerns: Guidelines from CDC and the Council of State and Territorial Epidemiologists . MMWR , 62 ( RR08 ) : 1 – 14 .
- CDC (Centers for Disease Control and Prevention) . 1990 . Guidelines for investigating clusters of health events . MMWR , 39 ( RR-11 ) : 1–16
- Johnson , BL. 2007 . Environmental Policy and Public Health , 297 – 8 . Boca Raton, FL , , USA : CRC Press .