Journal of Medical Internet Research
Vol 21, No 1 (2019): January
https://www.jmir.org/2019/1

JMIR Research Protocols (ISSN 1929-0748)
Estimating Vaccine Effectiveness Against Hospitalized Influenza During Pregnancy: Multicountry Protocol for a Retrospective Cohort Study
Allison L Naleway, Sarah Ball, Jeffrey C Kwong, Brandy E Wyant, Mark A Katz, Annette K Regan, Margaret L Russell, Nicola P Klein, Hannah Chung, Kimberley A Simmonds, Eduardo Azziz-Baumgartner, Becca S Feldman, Avram Levy, Deshayne B Fell, Steven J Drews, Shikha Garg, Paul Effler, Noam Barda, Stephanie A Irving, Patricia Shifflett, Michael L Jackson, Mark G Thompson
JMIR Res Protoc 2019 (Jan 21); 8(1):e11333