1. Department of Chemical and Pharmaceutical Sciences, INSTM UdR Trieste, Università degli Studi di Trieste, Via Licio Giorgieri 1, Trieste 34127, Italy
2. Neural Repair and Biomaterials Laboratory, Hospital Nacional de Parapléjicos (SESCAM), Finca la Peraleda s/n, 45071 Toledo, Spain
3. Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
4. Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL 60611, USA
5. Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
6. Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), Paseo de Miramón 194, Donostia-San Sebastián 20014, Spain
7. Ikerbasque, Basque Foundation for Science, Bilbao 48013, Spain