Affiliation: | 1. Department of Medicine, Medical College of Wisconsin, , Milwaukee, USA;2. Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, , Omaha, USA;3. 3Departments of Orthopaedic Surgery, Pathology and Radiology, Montefiore Medical Center, , Bronx, USA;4. Department of Laboratory Medicine/Pathology, Geisinger Medical Center, , Danville, USA |