1. Department of Bioengineering, Materials Research Institute, The Huck Institutes of the Life Sciences; The Pennsylvania State University; University Park Pennsylvania 16802
2. Department of Orthopaedics and Traumatology, Queen Mary Hospital; The University of Hong Kong; Hong Kong SAR
3. Department of Electrical Engineering; The University of Texas at Arlington; Arlington Texas 76010
4. Department of Bioengineering; The University of Texas at Arlington; Arlington Texas 76010