1. Department of Civil and Industrial Engineering; University of Pisa; Largo Lucio Lazzarino Pisa Italy
2. Novartis Vaccines Research Center; Siena Italy, now part of the GSK group of companies
3. CNR-IPCF, c/o Department of Civil and Industrial Engineering; University of Pisa; Largo Lucio Lazzarino Pisa Italy
4. Department of Mechanical and Aerospace Engineering, Politecnico di Torino; Corso Duca degli Abruzzi Turin Italy