NCT00681837
- Conditions
- Deglutition Disorders, Digestive System Diseases, Esophageal Diseases, +3 more
- Locations
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- Research Site Hefei, Anhui, China
- Research Site Chongqing, Chongqing Municipality, China
- Research Site Fuzhou, Fujian, China
- Research Site Guangzhou, Guangdong, China