[Comparison of microbiological assays carried out in different laboratories].
D001681:Biological Assay; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D011786:Quality Control; D014805:Vitamin B 12 / Q000494:pharmacology
D014805:Vitamin B 12
Esame comparativo di titolazioni microbiologiche fra vari laboratori.