@article{Brookhart2006,
author = {Brookhart, M.A. and Schneeweiss, S. and Rothman, K.J. and Glynn, R.J. and Avorn, J. and Stürmer, T.},
title= {Variable selection for propensity score models},
year = {2006},
doi = {10.1093/aje/kwj149},
journal = {American Journal of Epidemiology},
volume = {163},
number = {12},
pages = {1149--1156},
}