1. Istituto di Fisica
Applicata “Nello Carrara” - National Research Council
(IFAC-CNR), Via Madonna del Piano,
10, 50019 Sesto
Fiorentino (Florence), Italy
2. Scientific
Research Department, National Gallery of Art, Fourth and Constitution
Ave NW, Washington D.C. 20565, United States
3. Department
of Bioengineering, School of Engineering and Applied Science, The George Washington University, Washington, D.C. 20052, United States