@article{:/content/10.2807/1560-7917.ES.2016.21.38.30350, author = "Penttinen, Pasi M and Friede, Martin H", title = "Decreased effectiveness of the influenza A(H1N1)pdm09 strain in live attenuated influenza vaccines: an observational bias or a technical challenge?", journal = "Eurosurveillance", year = "2016", volume = "21", number = "38", eid = 30350, pages = "", url = "https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2016.21.38.30350", doi = "https://doi.org/10.2807/1560-7917.ES.2016.21.38.30350" }