Department of Orthopaedic Surgery, University of Pennsylvania, Perelman Medical School, 310A Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104, USA; Corresponding authors.
Geert Carmeliet
Laboratory of Clinical and Experimental Endocrinology, Department of Chronic Diseases and Metabolism, KU Leuven, O&N1bis Herestraat 49, 3000 Leuven, Belgium; Corresponding authors.
