1. University of Antwerp 1 Laboratory of Functional Morphology , , 2610 Antwerp , Belgium
2. University of Ghent 2 Department of Movement and Sports Sciences , , 9000 Ghent , Belgium
3. HNHP (UMR 7194), CNRS-MNHN-UPVD 3 , 75116 Paris , France
4. Primatology Station of the CNRS (UAR 846) 4 , 13790 Rousset , France
5. Institute of Life Course and Medical Sciences, University of Liverpool 5 , Liverpool, L7 8TX , UK