1. Institute of Physiotherapy; School of Health Professions; University of Applied Sciences Zurich; Winterthur Switzerland
2. Laboratory for Motion Analysis; Department of Paediatric Orthopaedics; Children's Hospital of Eastern Switzerland; St. Gallen Switzerland
3. Department of Orthopaedics and Traumatology; Kantonsspital; St. Gallen Switzerland
4. Department of Paediatric Orthopaedics; Children's Hospital of Eastern Switzerland; St. Gallen Switzerland