TY  - RPRT
TI  - Hepatitis B: old virus, new problems?
AU  - J A Barbara
PY  - 1994
DO  - 10.1111/j.1423-0410.1994.tb04584.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7975500/
ID  - 7975500
ER  -