@article{doi:10.1001/archinte.167.15.1690-a,
author = {Cheng H},
title = {The number needed to be exposed: A potential use for quantifying the strength of an individual risk factor including a protective factor in a cohort study},
journal = {Archives of Internal Medicine},
volume = {167},
number = {15},
pages = {1690-1691},
year = {2007},
doi = {10.1001/archinte.167.15.1690-a},
URL = { + http://dx.doi.org/10.1001/archinte.167.15.1690-a},
eprint = {/data/Journals/INTEMED/20251/ilt081307_1690_1690.pdf}
}