目的评价隐血珠对食管癌、胃癌筛查试验的真实性和可靠性。
Objective To evaluate the validity and reliabity of screening test of occult blood bead detector on esophageal cancer and gastric cancer.
目的评价隐血珠对食管癌、胃癌筛查试验的真实性和可靠性。
Objective To evaluate the validity and reliabity of screening test of occult blood bead detector on esophageal cancer and gastric cancer.
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