1. Cartela AB, 220 07 Lund, Sweden.
2. Department of Clinical Sciences, Lund, Oncology, Lund University, 221 85 Lund, Sweden.
3. Department of Molecular Medicine and Gene Therapy, Lund University, 221 84 Lund, Sweden.
4. Department of Orthopaedics, Case Western Reserve University, Cleveland, Ohio.
5. Present address: Department of Orthopaedics & Rehabilitation, Oregon Health and Science University, OP31, 3181 SW Sam Jackson Park Road, Portland, OR 97239.