Erratum to: Incidence of influenza virus infection among pregnant women: a systematic review. by Katz, MA, Gessner, BD, Johnson, J, Skidmore, B, Knight, M, Bhat, N, Marshall, H, Horne, DJ, Ortiz, JR, Fell, DB

Incidence of influenza virus infection among pregnant women: a systematic review by Katz, MA, Gessner, BD, Johnson, J, Skidmore, B, Knight, M, Bhat, N, Marshall, H, Horne, DJ, Ortiz, JR, Fell, DB

Influenza epidemiology and immunization during pregnancy: final report of a World Health Organization working group by Fell, DB, Azziz-Baumgartner, E, Baker, MG, Batra, M, Beauté, J, Beutels, P, Bhat, N, Bhutta, ZA, Cohen, C, De Mucio, B, Gessner, BD, Gravett, MG, Katz, MA, Knight, M, Lee, VJ, Loeb, M, Luteijn, JM, Marshall, H, Nair, H, Pottie, K, Salam, RA, Savitz, DA, Serruya, SJ, Skidmore, B