PT  - JOURNAL ARTICLE
AU  - Halperin, Scott A.
AU  - De Serres, Gaston
TI  - Has the change to acellular pertussis vaccine improved or worsened pertussis control?
AID  - 10.1503/cmaj.060817
DP  - 2006 Nov 07
TA  - Canadian Medical Association Journal
PG  - 1227--1227
VI  - 175
IP  - 10
4099  - http://www.cmaj.ca/content/175/10/1227.short
4100  - http://www.cmaj.ca/content/175/10/1227.full
SO  - CMAJ2006 Nov 07; 175