@article{doi:10.1001/archpsyc.60.7.702,
author = {Hettema JM and Annas P and Neale MC and Kendler KS and Fredrikson M},
title = {A twin study of the genetics of fear conditioning},
journal = {Archives of General Psychiatry},
volume = {60},
number = {7},
pages = {702-708},
year = {2003},
doi = {10.1001/archpsyc.60.7.702},
URL = { + http://dx.doi.org/10.1001/archpsyc.60.7.702},
eprint = {/data/Journals/PSYCH/5180/YOA20543.pdf}
}