@article{doi:10.1001/archinternmed.2011.491,
title = {BEijing, china},
journal = {Archives of Internal Medicine},
volume = {171},
number = {19},
pages = {1774},
year = {2011},
doi = {10.1001/archinternmed.2011.491},
URL = { + http://dx.doi.org/10.1001/archinternmed.2011.491},
eprint = {/data/Journals/INTEMED/22532/ilt102411_1774_1774.pdf}
}