G. Quartey, M. Feudjo-Tepie, J. Wang, and J. Kim. Pharmaceutical statistics, 10 (6):
539-47(November 2011)6482<m:linebreak></m:linebreak>CI: Copyright (c) 2011; JID: 101201192; aheadofprint;<m:linebreak></m:linebreak>Propensity score; Bias; Variables instrumentals; Introductori; Tipus d'estudis.