PT  - JOURNAL ARTICLE
ED  - ,
TI  - Past progressive
AID  - 10.1503/cmaj.1040281
DP  - 2004 Mar 02
TA  - Canadian Medical Association Journal
PG  - 835--835
VI  - 170
IP  - 5
4099  - http://www.cmaj.ca/content/170/5/835.short
4100  - http://www.cmaj.ca/content/170/5/835.full
SO  - CMAJ2004 Mar 02; 170