Observer bias in acellular pertussis vaccine trials.
Salmaso
S
S
Tozzi
A E
AE
Ciofi degli Atti
M L
ML
D002648:Child; D004341:Drug Evaluation / Q000706:statistics & numerical data*; D006801:Humans; D015588:Observer Variation; D010567:Pertussis Vaccine; D012107:Research Design
D010567:Pertussis Vaccine