D. Altman, and P. Royston. Statistics in medicine, 19 (4):
453-73(February 2000)6500<br/>LR: 20041117; CI: Copyright 2000; JID: 8215016; ppublish;<br/><br/>Models predictius; Avaluació de riscs.
P. Austin. Medical decision making : an international journal of the Society for Medical Decision Making, 29 (6):
661-77(2009)5458<m:linebreak></m:linebreak>Propensity score.