TY  - RPRT
TI  - [Hepatitis B immunization--when is a booster injection necessary?].
AU  - P J Grob
AU  - A Dufek
AU  - H I Joller-Jemelka
PY  - 1985
UR  - https://pubmed.ncbi.nlm.nih.gov/3158072/
ID  - 3158072
ER  -