Ongoing outbreaks of hepatitis A among men who have sex with men (MSM), Berlin, November 2016 to January 2017 – linked to other German cities and European countries Werber, Dirk and Michaelis, Kai and Hausner, Marius and Sissolak, Dagmar and Wenzel, Jürgen and Bitzegeio, Julia and Belting, Anne and Sagebiel, Daniel and Faber, Mirko, Eurosurveillance, 22, 30457 (2017), https://doi.org/10.2807/1560-7917.ES.2017.22.5.30457