[1] Aarhus Univ, Hosp Skejby, Dept Infect Dis, Aarhus, Denmark
[2] Karolinska Inst, Dept Med Solna, Infect Dis Unit, Stockholm, Sweden
[3] Stockholm Cty Council, Dept Communicable Dis Control & Prevent, Stockholm, Sweden
[4] Ctr Hosp Versailles, Intens Care Unit, F-78150 Le Chesnay, France
[5] Bernhard Nocht Inst Trop Med, Hamburg, Germany
[6] Univ Brescia, Univ Div Infect & Trop Dis, Brescia, Italy
[7] Spedali Civili Gen Hosp, Brescia, Italy
[8] Hosp Trop Dis, London NW1 0PE, England
[9] Univ London London Sch Hyg & Trop Med, London WC1E 7HT, England
[10] Univ Amsterdam, Acad Med Ctr, Dept Infect Dis, Ctr Trop Med & Travel Med, NL-1105 AZ Amsterdam, Netherlands
[11] Hosp Ramon & Cajal, Dept Infect Dis, E-28034 Madrid, Spain
[12] Univ Med Sci, Dept & Clin Trop & Parasit Dis, Poznan, Poland
[13] Univ Med & Pharm Carol Davila Bucharest, Clin Hosp Infect & Trop Dis Dr Victor Babes, Bucharest, Romania
[14] Med Univ Vienna, Div Infect Dis & Trop Med, Dept Med 1, Vienna, Austria
[15] Univ Zurich, Ctr Travel Med, Div Epidemiol & Communicable Dis, Zurich, Switzerland