TY  - RPRT
TI  - Letter: Decrease of HB-s Ag titers after repeated freezing and thawing.
AU  - M Schlaak
AU  - H Lehmann
AU  - H Schläfer
PY  - 1975
DO  - 10.1056/nejm197504242921717
UR  - https://pubmed.ncbi.nlm.nih.gov/1117920/
ID  - 1117920
ER  -