[1] Ist Ospitalieri Cremona, Div Malattie Infett & Trop, I-26100 Cremona, Italy
[2] Agenzia Sanitaria & Sociale Reg Emilia Romagna, Bologna, Italy
[3] Osped Riuniti Bergamo, Bergamo, Italy
[4] Osped Infermi Rimini, Rimini, Italy
[5] Univ Milan, Osped San Raffaele, I-20127 Milan, Italy
[6] Policlin G Martino, Messina, Italy
[7] Osped Esine BS, Brescia, Italy
[8] Univ Cattolica Sacro Cuore, Policlin A Gemelli, Rome, Italy
[9] Osped Cottolengo, Turin, Italy
[10] Spedali Civil Brescia, I-25125 Brescia, Italy
[11] ANIPIO, Rome, Italy