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Oral Contraceptives
1962
BMJ (Clinical Research Edition)
Preserved Fulltext
BRArrisH and 25 Ag./ml. methicillin but resistant to 12.5 ,ag./ml. The other one was resistant even to 100 lAg./ml. Two of these strains were resistant to 40 units of penicillin with the dilution method. The third one was sensitive to the same concentration of penicillin.
doi:10.1136/bmj.2.5296.52
fatcat:27t4gybgczaztp2qa2p7z77xni