Observer bias in acellular pertussis vaccine trials.
Wirsing von König
C H
CH
Schmitt
H J
HJ
Neiss
A
A
D002648:Child; D002986:Clinical Trials as Topic; D006801:Humans; D015588:Observer Variation; D010567:Pertussis Vaccine; D011446:Prospective Studies; D012107:Research Design; D014917:Whooping Cough / Q000453:epidemiology / Q000517:prevention & control*
D010567:Pertussis Vaccine