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De la Academia Americana de Pediatría:
http://www.aap.org/healthtopics/Autism.cfm
Del National Network for Immunization Information:
http://www.immunizationinfo.org/thimerosal_mercury_issues.cfm
Del Center for Disease Control (CDC):
http://www.cdc.gov/od/science/iso/concerns/thimerosal.htm
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