[1] Ist Nazl Malattie Infett Lazzaro Spallanzani IRCC, I-00149 Rome, Italy
[2] Univ Brescia, Clin Malattie Infett & Trop, Brescia, Italy
[3] Univ Roma Tor Vergata, Rome, Italy
[4] Univ Foggia, Foggia, Italy
[5] Univ Turin, Osped Amedeo di Savoia, Turin, Italy
[6] Univ Vita & Salute, Milan, Italy
[7] Univ Cattolica Sacro Cuore, Rome, Italy
[8] Univ Milan, Osped L Sacco, Milan, Italy
[9] Univ Milano Bicocca, Osped S Gerardo, Monza, Italy
[10] Osped SM Annunziata, Florence, Italy
[11] Osped S Giovanni Addolorata, Rome, Italy
[12] Univ Modena, Policlin Univ, I-41100 Modena, Italy
[13] Univ Roma La Sapienza, Rome, Italy