@article{Easterbrook1991,
author = {Easterbrook, P.J. and Gopalan, R. and Berlin, J.A. and Matthews, D.R.},
title= {Publication bias in clinical research},
year = {1991},
doi = {10.1016/0140-6736(91)90201-Y},
volume = {337},
number = {8746},
pages = {867--872},
}