1. Department of Computer Science and Information Engineering
and Research Center for Emerging Viral Infections, Chang Gung University,
259 Wen Hwa 1st Road, Taoyuan 333, Taiwan
2. Department of Computer Science, National Chiao Tung
University, 1001 Ta Hsueh Road, Hsinchu 300, Taiwan
3. Graduate Institute of Epidemiology, College of Public
Health, National Taiwan University, 17 Xu-Zhou Road, Taipei 10020, Taiwan,
wenthung@gmail.com