[1] Epiconcept, 25 Rue Titon, F-75011 Paris, France
[2] Antwerp Univ, Antwerp, Belgium
[3] Natl Inst Publ Hlth, Prague, Czech Republic
[4] Statens Serum Inst, Copenhagen, Denmark
[5] Publ Hlth England, London, England
[6] Tampere Univ, Tampere, Finland
[7] Finnish Inst Hlth & Welf, Helsinki, Finland
[8] Natl Publ Hlth Agcy, Sante Publ France, St Maurice, France
[9] Hlth Protect Surveillance Ctr, Dublin, Ireland
[10] Natl Inst Publ Hlth & Environm, Bilthoven, Netherlands
[11] Norwegian Inst Publ Hlth, Oslo, Norway
[12] Publ Hlth Agcy Catalonia, Barcelona, Spain
[13] CIBER Epidemiol & Salud Publ, Madrid, Spain
[14] Gen Directorate Publ Hlth Madrid Reg, Madrid, Spain
[15] Navarra Hosp Complex IdiSNA, Pamplona, Spain
[16] Publ Hlth Scotland, Glasgow, Lanark, Scotland
[17] Publ Hlth Agcy Sweden, Stockholm, Sweden
[18] Ctr Rech Clin & Biol, Creteil, France
[19] Childrens Hlth Ireland CHI Temple St, Dublin, Ireland
[20] Acad Med Ctr, Amsterdam, Netherlands
[21] Hosp St Joan de Deu, Barcelona, Spain
[22] Univ Int Catalunya, Barcelona, Spain
[23] Publ Hlth Inst Navarra IdiSNA, Pamplona, Spain
[24] Univ Glasgow, Glasgow, Lanark, Scotland
[25] Karolinska Inst, Stockholm, Sweden
[26] Karolinska Univ Hosp, Solna, Sweden
[27] European Ctr Dis Prevent & Control, Stockholm, Sweden