TY  - RPRT
TI  - Pertussis: old foe, persistent problem.
AU  - Camille Sabella
PY  - 2005
DO  - 10.3949/ccjm.72.7.601
UR  - https://pubmed.ncbi.nlm.nih.gov/16044656/
ID  - 16044656
ER  -