@article{doi:10.1001/archinternmed.2012.4306,
author = {Floyd JS and Psaty BM},
title = {Observational comparative effectiveness studies of drug therapies: High-quality answers or important clinical questions? comment on “comparative effectiveness of 2 β-blockers in hypertensive patients”},
journal = {Archives of Internal Medicine},
volume = {172},
number = {18},
pages = {1412-1414},
year = {2012},
doi = {10.1001/archinternmed.2012.4306},
URL = { + http://dx.doi.org/10.1001/archinternmed.2012.4306},
eprint = {/data/Journals/INTEMED/25300/iic120059_1412_1414.pdf}
}