S. Marks, D. Ciliska, and A. Jull. Evidence-based nursing, 9 (4):
100-4(October 2006)4369<m:linebreak></m:linebreak>LR: 20071115; PUBM: Print; JID: 9815947; ppublish;<m:linebreak></m:linebreak>Critical appraisal.
F. Lobo, S. Wagner, C. Gross, and J. Schommer. Research in social & administrative pharmacy : RSAP, 2 (1):
143-51(March 2006)6524<m:linebreak></m:linebreak>LR: 20071115; JID: 101231974; ppublish;<m:linebreak></m:linebreak>Propensity score; Introductori.