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Additional file 1: of Frequency and impact of confounding by indication and healthy vaccinee bias in observational studies assessing influenza vaccine effectiveness: a systematic review

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posted on 2015-10-17, 05:00 authored by Cornelius Remschmidt, Ole Wichmann, Thomas Harder
Protocol for systematic review: Frequency and impact of selection bias in observational studies assessing influenza vaccine effectiveness: A systematic review. (DOCX 24 kb)

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