Frequency and impact of confounding by indication and healthy vaccinee bias in observational studies assessing influenza vaccine effectiveness: a systematic review
Crossref DOI link: https://doi.org/10.1186/s12879-015-1154-y
Published Online: 2015-10-17
Published Print: 2015-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Remschmidt, Cornelius
Wichmann, Ole
Harder, Thomas
License valid from 2015-10-17