1. Interdisciplinary Pain Unit; Medical Centre of University of Munich; Germany
2. Department of Orthopaedics, Physical Medicine and Rehabilitation; Medical Centre of University of Munich; Germany
3. Department of Anaesthesia; Medical Centre of University of Munich; Germany
4. Department of Rehabilitation; City Hospital Bogenhausen; Munich Germany
5. Centre for Pain and the Brain; Boston Children's Hospital; Harvard Medical School; Boston USA