PT  - JOURNAL ARTICLE
AU  - Grisell Vargas-Schaffer
TI  - Is the WHO analgesic ladder still valid?
DP  - 2010 Jun 01
TA  - Canadian Family Physician
PG  - 514--517
VI  - 56
IP  - 6
4099  - http://www.cfp.ca/content/56/6/514.short
4100  - http://www.cfp.ca/content/56/6/514.full
SO  - Can Fam Physician2010 Jun 01; 56