1. 3B’s Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães 4805-017, Portugal
2. ICVS/3B’s − PT Government Associate Laboratory, Braga/Guimarães, Portugal
3. Bernal Institute, School of Engineering, University of Limerick, Limerick V94 T9PX, Ireland