1. CÚRAM, SFI Research Centre for Medical Devices, University of Galway, Galway H91 W2TY, Ireland
2. Department of Anatomy, Faculty of Medicine, Universiti Kebangsaan Malaysia, 56000 Cheras, Kuala Lumpur, Malaysia
3. Materials and Surface Science Institute, University of Limerick, Limerick V94 T9PX, Ireland
4. Conway Institute of Biomolecular and Biomedical Research and School of Physics, University College Dublin, Dublin 4, Ireland