From the *Department of Biomedical Engineering, College of Engineering, Peking University, Beijing; and †Department of Control Technology and Instrumentation, College of Quality and Technical Supervision, Hebei University, Baoding, China.
Received for publication July 8, 2015; accepted September 8, 2015.
Correspondence to: Kun Yang, PhD, Department of Control Technology and Instrumentation, College of Quality and Technical Supervision, Hebei University, No.180 Wusi East Road, Baoding 071000, China (e-mail: [email protected]); Qiushi Ren, PhD, Department of Biomedical Engineering, College of Engineering, Peking University, No. 5 Yiheyuan Rd, Beijing, China (e-mail: [email protected]).
This work is supported by the National Key Instrumentation Development Project (2011YQ030114), the National Basic Research Program of China (973 Program, 2011CB707500), the National Natural Science Foundation of China (11104058), and the Natural Science Foundation of Hebei Province (A2011201155).
The authors declare no conflict of interest.
