[1] Erasmus MC, Dept Viroscience, Rotterdam, Netherlands
[2] Univ Milan, Dept Expt Med & Surg, Milan, Italy
[3] Univ Med Ctr Utrecht, Clin Virol & Med Microbiol, Utrecht, Netherlands
[4] Luxembourg Inst Hlth, Dept Infect & Immun Esch Alzette, Strassen, Luxembourg
[5] Erasmus MC, Internal Med & Infect Dis Dept, Rotterdam, Netherlands
[6] Pomeranian Med Univ, Dept Infect Trop Dis & Immune Deficiency, Szczecin, Poland
[7] Univ Ljubljana, Inst Microbiol & Immunol, Ljubljana, Slovenia
[8] Hosp Univ San Cecilio, Inst Bioanitario Ibs Granada, Granada, Spain
[9] Univ Roma Tor Vergata, Dept Expt Med & Surg, Rome, Italy
[10] Hosp Univ San Cecilio, Clin Microbiol, Granada, Spain
[11] Univ Roma Tor Vergata, Dept Expt Med & Surg, Rome, Italy