[1] Univ Policlin Marche, Ist Malattie Infett & Med Pubbl, Azienda Osped Univ, Osped Riuniti Umberto I Lancisi Salesi, I-60020 Ancona, Italy
[2] Univ Policlin Marche, Ist Anat Patol, I-60020 Ancona, Italy
[3] Univ Policlin Marche, Ctr Gest Presidenza Med & Chirurg, I-60020 Ancona, Italy
[4] Univ Osped Riuniti Umberto I Lancisi Salesi, Microbiol Lab, Ancona, Italy
[5] Univ Florence, Ist Farmacol Preclin & Clin, Florence, Italy
[6] Univ Texas, Hlth Sci Ctr, Dept Pathol, San Antonio, TX 78284 USA
[7] S Texas Vet Hlth Care Syst, Audie L Murphy Div, San Antonio, TX USA