cnn http://ireport.cnn.com/docs/DOC-1164046 pubblicazione falsa http://www.ncbi.nlm.nih.gov/pubmed/14754936 replica cdc http://www.cdc.gov/vaccinesafety/Concerns/Autism/cdc2004pediatrics.html lettera thompson http://www.naturalnews.com/images/CDC-Gerberding-Warning-Vaccines-Autism.jpg