@article{doi:10.2106/JBJS.H.01597,
author = {Bryant, Dianne M. and Willits, Kevin and Hanson, Beate P.},
title = {Principles of Designing a Cohort Study in Orthopaedics},
journal = {The Journal of Bone & Joint Surgery},
volume = {91},
number = {Supplement_3},
pages = {10-14},
year = {2009},
doi = {10.2106/JBJS.H.01597},
URL = { + http://dx.doi.org/10.2106/JBJS.H.01597},
eprint = {}
}