1. WHO (2015). Fact sheet N°297. http://www.who.int/mediacentre/factsheets/fs297/en/ .
2. Jemal, A., Bray, F., Center, M. M., Ferlay, J., Ward, E., & Forman, D. (2011). Global cancer statistics. CA: A Cancer Journal for Clinicians, 61(2), 69–90. doi: 10.3322/caac.20107 .
3. Qin, X., Xu, H., Gong, W., & Deng, W. (2014). The tumor cytosol miRNAs, fluid miRNAs, and exosome miRNAs in lung cancer. Frontiers Oncology, 4, 357. doi: 10.3389/fonc.2014.00357 .
4. Gennatas, S., Noble, J., Stanway, S., Gunapala, R., Chowdhury, R., Wotherspoon, A., et al. (2015). Patterns of relapse in extrapulmonary small cell carcinoma: retrospective analysis of outcomes from two cancer centres. BMJ Open, 5(1), e006440. doi: 10.1136/bmjopen-2014-006440 .
5. Ma, Q., Liu, D., Guo, Y., Shi, B., Song, Z., & Tian, Y. (2010). Surgical therapeutic strategy for non-small cell lung cancer with mediastinal lymph node metastasis (N2). Zhongguo Fei Ai Za Zhi, 13(4), 342–348. doi: 10.3779/j.issn.1009-3419.2010.04.14 .