PT  - JOURNAL ARTICLE
AU  - Jennifer Nicholas
AU  - Martin C Gulliford
TI  - Commentary: What is a propensity score?
AID  - 10.3399/bjgp08X342471
DP  - 2008 Oct 01
TA  - British Journal of General Practice
PG  - 687--687
VI  - 58
IP  - 555
4099  - http://bjgp.org/content/58/555/687.short
4100  - http://bjgp.org/content/58/555/687.full
SO  - Br J Gen Pract2008 Oct 01; 58