TY  - RPRT
TI  - Early experience and immunity.
AU  - G F Solomon
AU  - S Levine
AU  - J K Kraft
PY  - 1968
DO  - 10.1038/220821a0
UR  - https://pubmed.ncbi.nlm.nih.gov/5698765/
ID  - 5698765
ER  -