Baseline and annual repeat rounds of screening: implications for optimal regimens of screening. - Henschke, Claudia I.; Salvatore, Mary; Cham, Matthew; Powell, Charles A.; DiFabrizio, Larry; Flores, Raja; Kaufman, Andrew; Eber, Corey; Yip, Rowena; Yankelevitz, David F.; International Early Lung Cancer Action Program Investigators (European Radiology, 2018)