Hanioka, T., Haresaku, S., Suzuki, N., Shimada, K., Watanabe, T., Ojima, M., Fujiie, K. and Watanabe, M. 2015. A Natural Experiment for Inferring Causal Association between Smoking and Tooth Loss: A Study of a Workplace Contemporary Cohort. International Journal of Statistics in Medical Research. 4, 4 (Nov. 2015), 331–336. DOI:https://doi.org/10.6000/1929-6029.2015.04.04.3.