RT Article T1 The impact of influenza epidemics on mortality: Introducing a severity index JF American journal of public health VO 87 IS 12 SP 1944 OP 1950 A1 Simonsen, Lone A1 Schonberger, Lawrence B. A1 Arden, Nancy H. A1 Stroup, Donna F. A1 Williamson, G. David A1 Clarke, Matthew J. A2 Schonberger, Lawrence B. A2 Arden, Nancy H. A2 Stroup, Donna F. A2 Williamson, G. David A2 Clarke, Matthew J. LA English YR 1997 UL https://krimdok.uni-tuebingen.de/Record/1912583194 DO 10.2105/AJPH.87.12.1944