@article{doi:,
author = {Einhorn, Thomas A.},
title = {Bone Graft Substitutes},
journal = {The Journal of Bone & Joint Surgery},
volume = {86},
number = {6},
pages = {1350-a-1351},
year = {2004},
doi = {},
URL = { + http://dx.doi.org/},
eprint = {}
}