[1] Univ Naples Federico II, Naples, Italy
[2] CNR, Naples, Italy
[3] Univ Cagliari, Cagliari, Italy
[4] Univ Bari, Bari, Italy
[5] Univ Florence, Florence, Italy
[6] St Andrea Hosp, Rome, Italy
[7] Cardarelli Hosp, Naples, Italy
[8] Univ Naples 2, Naples, Italy
[9] Neuromed, Pozzilli, Italy
[10] Univ Siena, I-53100 Siena, Italy
[11] IDC Hermitage Capodimonte, Naples, Italy
[12] Univ Roma La Sapienza, I-00185 Rome, Italy