Branko Barac, University of Belgrade School of Medicine, Institut of Rheumatology Belgrade, Serbia Stuart Carmichael, School of Veterinary Medicine, University of Surrey, UK Nikica Darabos, Clinic for Surgery, Clinical Hospital Center Zagreb Medical School, University of Zagreb, Croatia Christopher Evans, Rehabilitation Medicine Research Center, Mayo Clinic, USA Piotr Godek, Sutherland Medical Center, Warsaw, Poland Jens Hartmann, Center for Molecular Orthopaedics and Regenerative Medicine, Düsseldorf, Germany Alexandra Keller, Praxis für Tiermedizin & Chiropraktik, Frankfurt, Germany Martina Kerscher, Cosmetic Science, Department of Chemistry, University of Hamburg, Germany Otto Lanz, Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, USA William Maixner, Duke University Medical Center, USA Martin Majewski, Spital Oberengadin, Samedan, Switzerland Greg McGarrel, Nupsalla Veterinary Services, United Kingdom Carsten Moser, Grönemeyer Institute for Microtherapy, Bochum, Germany Paul Robbins, The Scripps Research Institute (TSRI), Department of Metabolism & Aging, Florida Campus, USA Rudolf H. Strümper, Orthopaedic Practice, Köln, Germany Julien Troillet, Orthogen Veterinary GmbH, Düsseldorf, Germany Andreas Veihelmann, ACURA-Kliniken Falkenburg und Waldbronn, Sportklinik Stuttgart, Germany Peter Wehling, Center for Molecular Orthopaedics and Regenerative Medicine, Düsseldorf and Orthogen AG, Düsseldorf, Germany