1. Sichuan Centers for Disease Control and Prevention, Chengdu, Sichuan Province, People's Republic of China
2. University of Salford, Salford, United Kingdom
3. Sichuan Centers for Disease Control and Prevention, Chengdu, Sichuan Province, People's Republic of ChinaAsahikawa Medical College, Asahikawa, Japan
4. Asahikawa Medical College, Asahikawa, Japan
5. World Health Organization Collaborating Centre for the Prevention and Treatment of Alveolar Echinococcosis, Université de Franche-Comté, Besancon, France
6. Centers for Disease Control and Prevention, Atlanta, Georgia, USA