The author had conducted the clinical study on early diagnosis and early therapy of esophageal cancer (EC) in the area of high prevalence for more than 30 years.
2
方法在中国食管癌高发区之一潮汕地区进行了一项大型的病例-对照研究。
Methods A large scale of case-control study was conducted in Chaoshan region of China, which is one of high incidence district of esophageal cancer.
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