Lansbury, L. E., Smith, S., Beyer, W., Karamehic, E., Pasic-Juhas, E., Sikira, H., Mateus, A., Oshitani, H., Zhao, H., Beck, C. R., & Nguyen-Van-Tam, J. (in press). Effectiveness of 2009 pandemic influenza A(H1N1) vaccines: a systematic review and meta-analysis. Vaccine, https://doi.org/10.1016/j.vaccine.2017.02.059