1. Department of Parasitology, Chung Shan Medical University, 110, Section 1, Chien-Kuo North Road, Taichung 402, Taiwan.
2. Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan.
3. Department of Medical Laboratory Science and Biotechnology, Chung Hwa University of Medical Technology, Tainan 717, Taiwan.