Risk of Preterm or Small-for-Gestational-Age Birth After Influenza Vaccination During Pregnancy: Caveats When Conducting Retrospective Observational Studies

American journal of epidemiology, 2016-08, Vol.184 (3), p.176-186 [Peer Reviewed Journal]

The Author 2016. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. ;The Author 2016. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. 2016 ;ISSN: 0002-9262 ;EISSN: 1476-6256 ;DOI: 10.1093/aje/kww043 ;PMID: 27449414

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