1. Department of Materials Engineering; KU Leuven; Kasteelpark Arenberg 44 bus 2450 B-3001 Leuven Belgium
2. Department of Mechanical Engineering; Smart Instrumentation Research Group; KU Leuven, Vesaliusstraat 13 B-3000 Leuven Belgium
3. Department of Neurosurgery; University Hospital Gasthuisberg; KU Leuven Leuven Belgium
4. Department of Mechanical Engineering; Biomechanics Section; KU Leuven, Celestijnenlaan 300 B-3001 Leuven Belgium