从1964年开始他成为费城福克斯·蔡斯癌症中心的一员，从1977年开始他取得了宾夕法尼亚大学医学和人类学的大学教授的职位。

He has been a member of the Fox Chase Cancer Center in Philadelphia since 1964 and has held the rank of University Professor of Medicine and Anthropology at the University of Pennsylvania since 1977.

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没有参与此项研究的费城福克斯·蔡斯癌症中心(Fox Chase Cancer Center)迈克尔·昂格尔(Michael Unger)教授说，CT扫描并不能诊断癌症。

The screenings also don't diagnose cancer, says Michael Unger, a professor at Philadelphia's Fox Chase cancer Center, who wasn't involved in the study.

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