1. Department of Virology, Philipps University Marburg, Robert-Koch-Str. 17, 35037 Marburg, Germany
2. Filovirus Laboratory, INSERM U412, Claude Bernard University Lyon 1, IFR 128, BioSciences Lyon-Gerland, 21 av Tony Garnier, 69365 Lyon Cedex 07, France
3. Dade Behring Marburg GmbH, Marburg, Germany