1. Department of Orthopedics, Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, Hubei, P.R. China
2. Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
3. Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
4. Institute of Pathology, University Hospital of Essen, University Duisburg-Essen, Essen, Germany
5. Institute of Pathology, Medical University of Innsbruck, Innsbruck, Austria
6. Department of Pediatric Surgery, Medical University of Innsbruck, Innsbruck, Austria