PT  - JOURNAL ARTICLE
AU  - Jon F.R. Barrett
AU  - Arthur Zaltz
AU  - Michael Geary
AU  - Mathew Sermer
AU  - John Kingdom
TI  - Beware selection bias
AID  - 10.1503/cmaj.733261
DP  - 2017 Aug 28
TA  - Canadian Medical Association Journal
PG  - E1096--E1096
VI  - 189
IP  - 34
4099  - http://www.cmaj.ca/content/189/34/E1096.short
4100  - http://www.cmaj.ca/content/189/34/E1096.full
SO  - CMAJ2017 Aug 28; 189