[1] European Ctr Dis Prevent & Control ECDC, ECDC Fellowship Programme, Field Epidemiol Path EPIET, Stockholm, Sweden
[2] Finnish Inst Hlth & Welf THL, Helsinki, Finland
[3] Environm Serv, Food Safety Unit, Helsinki, Finland
[4] Finnish Food Author FFA, Helsinki, Finland
[5] Univ Helsinki, Abdominal Ctr, Dept Nephrol, Helsinki, Finland
[6] Helsinki Univ Hosp, Helsinki, Finland
[7] HUS Helsinki Univ Hosp, Inflammat Ctr, Div Infect Dis, Helsinki, Finland
[8] Environm Off, Seinajoki, Finland