Case reports in the medical literature numbered only 374 worldwide in 1912, but a review of autopsies showed the incidence of lung cancer had increased from 0.3% in 1852 to 5.66% in 1952.
在1912年，全世界医学文献中的肺癌病例报告只有374例，但是一篇尸检的综述表明肺癌的发病率已经从1852年的0.3%上升到了1952年的5.66%。