@article{doi:10.1302/0301-620X.99B4.BJJ-2016-1247,
author = {Costa, M. L. and Griffin, X. L. and Parsons, N. and Dritsaki, M. and Perry, D.},
title = {Efficacy versus effectiveness
in clinical trials},
journal = {The Bone & Joint Journal},
volume = {99-B},
number = {4},
pages = {419-420},
year = {2017},
doi = {10.1302/0301-620X.99B4.BJJ-2016-1247},
url = {https://doi.org/10.1302/0301-620X.99B4.BJJ-2016-1247}
}