目的探讨宫颈癌发生的危险因素。
Objective to investigate the risk factors of cervical cancer.
多年的研究发现，环境因素仍是食管癌发生的主要原因。
Epidemiology studies indicated that environment factors were the main causes of EC.
目的：探讨蛋白酶ich - 1与鼻咽癌发生的关系。
Objective: To study the relationship between proteinase ICH 1 and tumorigenesis of nasopharyngeal epithelium.
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