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2. Autism: Is There a Vaccine Connection? Part I. Available from: http: //www.garynull.com/Documents/autism99b.htm
3. Autism: Is There a Vaccine Connection? Part III. Available from: http: //www.garynull.com/Documents/autism99b3.htm
4. Future Challenges to Childhood Immunizations. AAP; June 12–13, 2000
5. 2nd International NVIC Conference on Immunizations; September 10–12, 2000