@article{doi:10.1001/jama.2010.892,
author = {Chapman GB and Li M and Colby H and Yoon H},
title = {OPting in vs opting out of influenza vaccination},
journal = {JAMA},
volume = {304},
number = {1},
pages = {43-44},
year = {2010},
doi = {10.1001/jama.2010.892},
URL = { + http://dx.doi.org/10.1001/jama.2010.892},
eprint = {/data/Journals/JAMA/4519/jlt0707_43_44.pdf}
}