| 1 | Si Guangyan; et al Department of Interventional Ward; the Affiliated Hospital of Luzhou Medical College; | |
| 2 | Other casualties were reported in cities including Ya'an, Ziyang and the Garze Tibetan Autonomous Prefecture. | |
| 3 | Investigations conducted by Chinese epidemiologists indicate that the first human cases occurred at the end of June in Ziyang City, Sichuan Province. | |
| 4 | Methods A self-administered questionnaire survey was conducted among 448 high school students in Ziyang City. |
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