1. Department of Biochemistry and Molecular Biology IV, Veterinary Faculty, Complutense University of Madrid, Madrid, Spain.
2. Aragon Institute of Health Sciences, Networking Center on Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Zaragoza, Spain.
3. Division of Cellular and Gene Therapies, Center for Biologics Evaluation and Research, U.S. Food and Drug Administration, Bethesda, Maryland.
4. Departement of Musculoskeletal Sciences, Katholieke Universiteit Leuven and Division Prometheus-Skeletal Tissue Engineering, K.U. Leuven Research and Development, Leuven, Belgium.