1. Endocrine Research Unit, Division of Endocrinology Department of Internal Medicine, Mayo Clinic Rochester Minnesota USA
2. Department of Physical Therapy, School of Health Professions Concordia University of Wisconsin Mequon Wisconsin USA
3. Air Force Research Laboratory, 711th Human Performance Wing, Wright Patterson Air Force Base Dayton Ohio USA
4. Department of Geriatrics Shanghai Jiaotong University Affiliated Sixth People's Hospital Shanghai China
5. Department of Biomedical Statistics and Informatics, Mayo Clinic Rochester Minnesota USA