据《中华肿瘤杂志》1994年第16卷第1期报道，哈尔滨医科大学公共卫生学院胡锦富等用时序暴露因素的调耷分析探讨了肺癌潜伏期。对168例有病理诊断依据的男性原发性肺癌患者进行1：2配比的病例研究，他们对吸烟史、职业和有害物质接触史，做饭燃料和取暖方式按时间顺序收集资料? According to “Chinese Journal of Oncology”, Vol. 16, No. 1, 1994, Harbin Medical University’s School of Public Health, Hu Jinfu et al. used a time-varying analysis of factors to explore the incubation period of lung cancer. A 1:2 matching case study was conducted on 168 male patients with primary lung cancer who had a pathological diagnosis. They collected data on the history of smoking, exposure to occupational and hazardous substances, cooking fuel and heating methods in chronological order.