Survey and case-control study during epidemics of Puumala virus infection Winter, C.H.; Brockmann, S.O.; Piechotowski, I.; Alpers, K.; an der Heiden, M.; Koch, J.; Stark, K.; Pfaff, G. Epidemiology and Infection 137(10): 1479-1485 2009 0950-2688 10.2307/40272180 https://eurekamag.com/research/025/621/025621950.php