1. Smith-Bindman, R., Lipson, J., Marcus, R., et al.: Radiation dose associated with common computed tomography examinations and the associated lifetime attributable risk of cancer. Arch. Intern. Med. 169(22), 2078–2086 (2009), doi:10.1001/archinternmed.2009.427
2. Berrington de González, A., Mahesh, M., Kim, K.P., et al.: Projected cancer risks from computed tomographic scans performed in the United States in 2007. Arch. Intern. Med. 169(22), 2071–2077 (2009)
3. Agrawal, R., Srikant, R.: Fast algorithm for mining association rules in large databases. In: Proceedings of the 20th International Conference on Very Large Data bases, VLDB, Santiago, Chile, pp. 487–499 (September 1994)
4. Pei, J., Han, J., et al.: PrefixSpan: Mining sequential patterns efficiently by prefix-projected pattern growth. In: Proceedings of the 17th International Conference on Data Engineering, ICDE, Heidelberg, Germany, pp. 215–224 (2001)
5. Pei, J., Han, J., Mortazavi-Asl, B., Wang, J., Pinto, H., Chen, Q., Dayal, U., Hsu, M.C.: Mining Sequential Patterns by Pattern-growth: The PrefixSpan Approach. IEEE Transactions on Knowledge and Data Engineering 16(11), 1424–1440 (2004)