1. Institute of Applied Mechanics, National Taiwan University, Taipei 106, Taiwan
2. Department of Orthopaedic Surgery, Bone and Joint Research Center, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan 333, Taiwan
3. Institute of Atomic Physics and Spectroscopy, University of Latvia, Jelgavas Street 3, LV-1004 Riga, Latvia
4. State Research Institute Center for Physical and Technological Sciences, Sauletekio Ave. 3, LT-10257 Vilnius, Lithuania
5. Department of Applied Physics and Chemistry, University of Taipei, Taipei 100, Taiwan