@article{Dieleman2014,
author = {Dieleman, J.  and Templin, T. },
title= {Random-effects, fixed-effects and the within-between specification for clustered data in observational health studies: A simulation study},
year = {2014},
doi = {10.1371/journal.pone.0110257},
journal = {PLoS One},
volume = {9},
number = {10},
pages = {e110257},
}