@article{doi:10.1001/archpsyc.56.9.842,
author = {Spencer T and Biederman J and Coffey B and Geller D and Wilens T and Faraone S},
title = {THe 4-year course of tic disorders in boys with attention-deficit/hyperactivity disorder},
journal = {Archives of General Psychiatry},
volume = {56},
number = {9},
pages = {842-847},
year = {1999},
doi = {10.1001/archpsyc.56.9.842},
URL = { + http://dx.doi.org/10.1001/archpsyc.56.9.842},
eprint = {/data/Journals/PSYCH/5097/yoa7411.pdf}
}