1. Vaccines, Antivirals, and Evidence Generation, Pfizer Biopharma Group, Collegeville, PA 19426, USA
2. Pfizer Vaccines, Tadworth, Surrey KT20 7NS, UK
3. Vaccines, Pfizer Corporation Austria, 1210 Vienna, Austria
4. Vaccine Medical Affairs, Pfizer Poland Inc., 02-092 Warsaw, Poland
5. National Institute of Public Health, 00-791 Warsaw, Poland
6. Pfizer Vaccines, 75014 Paris, France
7. Vaccines, Antivirals, and Evidence Generation, Pfizer Biopharma Group, Cambridge, MA 02139, USA