TY  - RPRT
TI  - Improving immunization strategies in developed countries.
AU  - U B Schaad
PY  - 1999
DO  - 10.1016/s0264-410x(99)00237-6
UR  - https://pubmed.ncbi.nlm.nih.gov/10506411/
ID  - 10506411
ER  -