Petrignani, M Norovirus introduction routes into nursing homes and risk factors for spread: a systematic review and meta-analysis of observational studies. [electronic resource] - The Journal of hospital infection Mar 2015 - 163-78 p. digital Publication Type: Journal Article; Meta-Analysis; Review; Systematic Review ISSN: 1532-2939 Standard No.: 10.1016/j.jhin.2014.11.015 doi Subjects--Topical Terms: Caliciviridae Infections--epidemiologyDisease Outbreaks--prevention & controlDisease Transmission, InfectiousHumansInfection Control--methodsNorovirus--isolation & purificationNursing HomesObservational Studies as TopicRisk Factors