PT  - JOURNAL ARTICLE
AU  - Jacalyn Duffin
TI  - Do practice guidelines cause drug shortages? The historical example of β-blockers
AID  - 10.1503/cmaj.190289
DP  - 2019 Sep 16
TA  - Canadian Medical Association Journal
PG  - E1029--E1031
VI  - 191
IP  - 37
4099  - http://www.cmaj.ca/content/191/37/E1029.short
4100  - http://www.cmaj.ca/content/191/37/E1029.full
SO  - CMAJ2019 Sep 16; 191