TY  - RPRT
TI  - Letter from the editors.
AU  - L M Freeman
AU  - M D Blaufox
PY  - 1971
DO  - 10.1016/s0001-2998(71)81034-6
UR  - https://pubmed.ncbi.nlm.nih.gov/5118492/
ID  - 5118492
ER  -