1. Department of Materials Engineering; KU Leuven, Kasteelpark Arenberg 44, Box 2450; Leuven 3001 Belgium
2. Prometheus, Division of Skeletal Tissue Engineering; KU Leuven, O&N 1, Herestraat 49, Box 813; Leuven 3000 Belgium
3. Skeletal Biology and Engineering Research Center; KU Leuven, O&N 1, Herestraat 49, Box 813; Leuven 3000 Belgium