http://www.oatext.com/Preterm-birth,-vaccination-and-neurodevelopmental-disorders-a-cross-sectional-study-of-6-to-12-year-old-vaccinated-and-unvaccinated-children.php
http://www.oatext.com/Pilot-comparative-study-on-the-health-of-vaccinated-and-unvaccinated-6-to-12-year-old-U.S.-children.php