1. Department of Orthopedics, Chinese PLA General Hospital, Beijing, China
2. Health Economics, Johnson & Johnson Medical China, Shanghai, China
3. Health Economics & Market Access, Johnson & Johnson Medical Devices Companies, Somerville, NJ, USA
4. Health Economics, Johnson & Johnson Medical Asia-Pacific, Singapore
5. Health Economics and Outcomes Research, Changsha Normin Health Technology Ltd, Changsha, Hunan, China
6. Health Economics and Outcomes Research, Normin Health Consulting Ltd, Toronto, Ontario, Canada