@article{doi:10.2106/JBJS.L.00242,
author = {Castillo, Renan C. and Scharfstein, Daniel O. and MacKenzie, Ellen J.},
title = {Observational Studies in the Era of Randomized TrialsFinding the Balance},
journal = {The Journal of Bone & Joint Surgery},
volume = {94},
number = {Suppl 1(E)},
pages = {112-117},
year = {2012},
doi = {10.2106/JBJS.L.00242},
URL = { + http://dx.doi.org/10.2106/JBJS.L.00242},
eprint = {}
}