PT  - JOURNAL ARTICLE
AU  - Jones, S R
AU  - Carley, S
AU  - Harrison, M
TI  - An introduction to power and sample size estimation
AID  - 10.1136/emj.20.5.453
DP  - 2003 Sep 01
TA  - Emergency Medicine Journal
PG  - 453--458
VI  - 20
IP  - 5
4099  - http://emj.bmj.com/content/20/5/453.short
4100  - http://emj.bmj.com/content/20/5/453.full
SO  - Emerg Med J2003 Sep 01; 20
AB  - The importance of power and sample size estimation for study design and analysis.