Letters Autism spectrum disorder is not as certain as implied BMJ 2003; 326 doi: https://doi.org/10.1136/bmj.326.7396.986 (Published 03 May 2003) Cite this as: BMJ 2003;326:986 Article Related content Metrics Responses Peer review Related articles Editorial The causes of autism spectrum disorders Published: 25 January 2003; BMJ 326 doi:10.1136/bmj.326.7382.173