1. Vaccine Research Center, University of Tampere, Tampere, Finland
2. Biostatistics, Merck & Co. Inc., Rahway, NJ, USA
3. MCM Vaccine B. V., Leiden, The Netherlands
4. Clinical Operations, Merck & Co., Inc., Rahway, NJ, USA
5. Global Medical and Vaxelis Business Unit, Sanofi Pasteur, Swiftwater, PA, USA
6. Clinical Research Vaccines, Merck & Co., Inc., Rahway, NJ, USA