title: Is it necessary to adjust for calendar time in a test negative design?: Responding to: Jackson ML, Nelson JC. The test negative design for estimating influenza vaccine effectiveness. Vaccine 2013;31(April (17)):2165-8.
authors.affiliation: Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Perth, WA, Australia. Electronic address: peterj@ichr.uwa.edu.au.
authors.forename: Peter
authors.initials: P
authors.lastname: Jacoby
authors.affiliation: Victorian Infectious Diseases Reference Laboratory, Melbourne, Victoria, Australia.
authors.forename: Heath
authors.initials: H
authors.lastname: Kelly
mesh_terms: D006801:Humans; D007252:Influenza Vaccines / Q000276:immunology*; D007251:Influenza, Human / Q000517:prevention & control*; D012107:Research Design
chemical_list: D007252:Influenza Vaccines