Pandemic influenza A H1N1 2009 infection versus vaccination: a cohort study comparing immune responses in pregnancy.
Fisher BM, Van Bockern J, Hart J, Lynch AM, Winn VD, Gibbs RS, Weinberg A. Pandemic influenza A H1N1 2009 infection versus vaccination: a cohort study comparing immune responses in pregnancy. PLoS One. 2012; 7(3):e33048.