1. Division of Metabolism and Endocrinology, Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
2. School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.
3. Center of Physical Therapy, National Taiwan University Hospital, Taipei, Taiwan.
4. Department of Electrical and Electronic Engineering, and Medical Engineering Programme, The University of Hong Kong, Hong Kong, China.
5. Department of Medical Image and Radiology, National Taiwan University, Medical College and Hospital, Taipei, Taiwan.
6. Department of Orthopaedics, Clintec, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.