Hirooka N, Kadowaki T, Sekikawa A, Ueshima H, Choo J, Miura K, Okamura T, Fujiyoshi A, Kadowaki S, Kadota A, Nakamura Y, Maegawa H, Kashiwagi A, Masaki K, Sutton-Tyrrell K, Kuller LH, Curb JD, Shin C. Influence of cigarette smoking on coronary artery and aortic calcium among random samples from populations of middle-aged Japanese and Korean men. J Epidemiol Community Health. 2013 Feb; 67(2):119-24.