@article{doi:,
author = {FREEDMAN, KEVIN B. and BERNSTEIN, JOSEPH},
title = {Current Concepts Review - Sample Size and Statistical Power in Clinical Orthopaedic Research*},
journal = {The Journal of Bone & Joint Surgery},
volume = {81},
number = {10},
pages = {1454-60},
year = {1999},
doi = {},
URL = { + http://dx.doi.org/},
eprint = {}
}