1 Department of Physical and Rehabilitation Medicine, UZ Leuven, Leuven, Belgium.
2 Department of Radiology, AZ Delta Campus Rumbeke, Deltalaan 1, 8800 Roeselare, Belgium. Electronic address: [email protected].
3 Department of Physical and Rehabilitation Medicine, UZ Leuven, Leuven, Belgium; Department of Development and Regeneration, University Leuven, Leuven, Belgium.