Agency for Toxic Substances and Disease Registry 
Case Studies in Environmental Medicine (CSEM) 
Disease Clusters: An Overview
Web Resources

1. Association of Occupational and Environmental Clinics (AOEC) at www.aoec.org/ or 202-347-4976.
2. Agency for Toxic Substances and Disease Registry (ATSDR). For general information, contact www.atsdr.cdc.gov or toll-free (1-888-42-ATSDR or 1-888-422-8737). The ATSDR Emergency Response 24-hour hotline number is 404-498-0120.
3. Fleming LE. Disease clusters in occupational and environmental health. Available from URL: www.pighealth.com/Scourse/lecture/lec0351/index.htm.
4. National Institute for Occupational Safety and Health (NIOSH) at www.cdc.gov/niosh or toll-free (1-800-35-NIOSH or 1-800-356-4674).
5. National Research Council (NRC) at www.nationalacademies.org/nrc/.
6. Occupational Safety and Health Administration (OSHA) at www.osha.gov or emergency toll-free 1-800-321-OSHA (1-800-321-6742).
7. Pediatric Environmental Health Specialty Units (PEHSUs) at www.aoec.org/pesu.htm or 202-347-4976 (AOEC office).
8. State and local health departments, toxicologists, and industrial hygienists.
9. U.S. Environmental Protection Agency (EPA) at www.epa.gov.

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