Furthermore, nonsmokers constitute approximately 53% of female lung cancer patients and an increasing trend of the proportion of lung cancer in non-smokers was observed by several researches which suggested that other environmental risk factors or genetic background especially play an indispensable role in the development of lung cancer[ 4 – 6 ].
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Association of MicroRNA-149 Polymorphism with Lung Cancer Risk in Chinese Non-Smoking Female: A Case-Control Study.
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