PT  - JOURNAL ARTICLE
AU  - Peter Wilton
TI  - A rule of thumb
DP  - 2002 Dec 10
TA  - Canadian Medical Association Journal
PG  - 1367--1367
VI  - 167
IP  - 12
4099  - http://www.cmaj.ca/content/167/12/1367.short
4100  - http://www.cmaj.ca/content/167/12/1367.full
SO  - CMAJ2002 Dec 10; 167