1. School of Sport, Exercise and Rehabilitation Sciences Centre of Precision Rehabilitation for Spinal Pain (CPR Spine) University of Birmingham Birmingham U.K
2. Center for Anesthesiology, Emergency and Intensive Care Medicine University Hospital Göttingen Göttingen Germany
3. Department of Business, Health and Social Care Research Methodology Competence Centre University of Applied Sciences and Arts of Southern Switzerland (SUPSI) Manno Switzerland
4. Department of Business, Health and Social Care University of Applied Sciences and Arts of Southern Switzerland (SUPSI) Manno Switzerland