@article{doi:10.1001/archpediatrics.2009.84,
author = {Waldman M and Nicholson S},
title = {Autism prevalence and precipitation: The potential for cross-level bias—reply},
journal = {Archives of Pediatrics & Adolescent Medicine},
volume = {163},
number = {5},
pages = {492-493},
year = {2009},
doi = {10.1001/archpediatrics.2009.84},
URL = { + http://dx.doi.org/10.1001/archpediatrics.2009.84},
eprint = {/data/Journals/PEDS/5142/plt0509_492a_493.pdf}
}