1. School of Medical Information Engineering, Guangdong Pharmaceutical University, Guangzhou, People’s Republic of China
2. Department of Computer Science, American University, Washington, DC, USA
3. Guangdong Chinese Medicine Big Data Engineering Research Center, Guangzhou, People’s Republic of China
4. Communication & Computer Network Lab of Guangdong, Guangzhou, People’s Republic of China
5. Information and Network Engineering and Research Center, South China University of Technology, Guangzhou, People’s Republic of China