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Evaluating the effectiveness, impact and safety of live attenuated and seasonal inactivated influenza vaccination: protocol for the Seasonal Influenza Vaccination Effectiveness II (SIVE II) study.
Simpson CR, Lone NI, Kavanagh K, Robertson C, McMenamin J, von Wissmann B, Vasileiou E, Butler C, Ritchie LD, Gunson R, Schwarze J, Sheikh A. Simpson CR, et al. BMJ Open. 2017 Feb 28;7(2):e014200. doi: 10.1136/bmjopen-2016-014200. BMJ Open. 2017. PMID: 28246142 Free PMC article.