1. Department of Parasitology, Taipei Medical University College of Medicine, 250 Wu-Hsing Street, Taipei 110-31, Taiwan.
2. School of Medical Laboratory Science & Biotechnology, Taipei Medical University College of Medicine, 250 Wu-Hsing Street, Taipei 110-31, Taiwan.
3. Division of Gastroenterology, Department of Internal Medicine, Taipei Medical University College of Medicine, 250 Wu-Hsing Street, Taipei 110-31, Taiwan.
4. Department of Laboratory Medicine, Taipei City Hospital Yang-Ming Branch, 105 Yusheng Street, Shihlin, Taipei 111, Taiwan.