@misc{9250,
  author = {G. Amirthalingam and N. Andrews and H. Campbell and S. Ribeiro and E. Kara and K. Donegan and N. Fry and E. Miller and M. Ramsay},
  title = {Effectiveness of maternal pertussis vaccination in England: an observational study},
  year = {2014},
  journal = {Lancet},
  volume = {384},
  number = {9953},
  pages = {1521-8},
  issn = {0140-6736},
  doi = {10.1016/s0140-6736(14)60686-3},
}