Article Information
Author Information
- From the *Vaccine Evaluation Center, British Columbia's Children's Hospital and the University of British Columbia, and the †University of British Columbia Centre for Disease Control, Vancouver, BC.
- Correspondence to:
Dr. Jan J. Ochnio, Vaccine Evaluation Center, Rm 317A, 950 W 28th Ave., Vancouver BC V5Z 4H4; fax 604 875-2496; [email protected]