1. aNew Technologies – Research Centre (NTC), University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech Republic jagan@ntc.zcu.cz
2. bDepartment of Biomedical Engineering, Chang Gung University, Taoyuan 33302, Taiwan swtsai@cgu.edu.tw
3. cInstitute for Quantitative Health Science and Engineering (IQ) and College of Human Medicine, Michigan State University, East Lansing, MI 48824, USA