1. Murray CJ, Lopez AD (1997) Mortality by cause for eight regions of the world: global burden of disease study. Lancet 349:1269–1276
2. Murphy GP et al (1995) American Cancer Society textbook of clinical oncology, 2nd edn. The American Cancer Society, Atlanta
3. Frost JK et al (1984) Early lung cancer detection: results of the initial (prevalence) radiologic and cytologic screening in the Johns Hopkins study. Am Rev Respir Dis 130:549–554
4. Fontana RS et al (1984) Early lung cancer detection: results of the initial (prevalence) radiologic and cytologic screening in the Mayo Clinic study. Am Rev Respir Dis 130:561–565
5. Henschke CI et al (1994) Radiographic screening for cancer. Proposed paradigm for requisite research. Clin Imaging 18:16–20