PT  - JOURNAL ARTICLE
AU  - Padmaja Subbarao
AU  - Piush J Mandhane
AU  - Malcolm R Sears
TI  - Asthma: epidemiology, etiology and risk factors
AID  - 10.1503/cmaj.080612
DP  - 2009 Sep 14
TA  - Canadian Medical Association Journal
4099  - http://www.cmaj.ca/content/early/2009/09/14/cmaj.080612.short
4100  - http://www.cmaj.ca/content/early/2009/09/14/cmaj.080612.full