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病例组为瑞典东南部和北部地区癌症登记中心的185例女性甲状腺乳头状或乳头/滤泡混合型癌症患者,确诊时间为1977-1989年,确诊时的年龄为20-70岁。对照组为同一地区426名年龄与病例组相似的女性居民。
The case group consisted of 185 women with mixed thyroid papillary or papillary/follicular cancer at the Cancer Registry in the southeastern and northern regions of Sweden. The time of diagnosis was 1977-1989. The age at diagnosis was 20-70 years old. The control group was 426 female residents of similar age and case groups in the same area.