TY  - RPRT
TI  - Letter: Risks of repeated immunization.
AU  - L F Ayvazian
PY  - 1975
DO  - 10.7326/0003-4819-82-4-589_1
UR  - https://pubmed.ncbi.nlm.nih.gov/1119779/
ID  - 1119779
ER  -