PEDIATRICS · 2013 · 190 citations · 26 references
Teenagers who received DTwP vaccines in childhood were more protected during a pertussis outbreak than were those who received DTaP vaccines.
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Tests for Linear Trends in Proportions and Frequencies
P. Armitage · Biometrics · 1955 · 2.1K citations
Dalya Güriş, Peter M. Strebel, Barbara H. Bardenheier et al. · Clinical Infectious Diseases · 1999 · 448 citations · Full text