TY  - RPRT
TI  - On observer errors in pertussis vaccine studies.
AU  - J Taranger
AU  - B Trollfors
PY  - 1997
DO  - 10.1097/00006454-199709000-00022
UR  - https://pubmed.ncbi.nlm.nih.gov/9306494/
ID  - 9306494
ER  -