1. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology (MIT), Massachusetts Avenue 77, Cambridge, Massachusetts 02139, United States
2. Department of Civil and Industrial Engineering, University of Pisa, Largo L. Lazzarino 2, 56122 Pisa, Italy
3. Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
4. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
5. Department of Energy, Politecnico di Milano, via Lambruschini 4a, 20156 Milano, MI, Italy