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Stages of Non-Small Cell Lung Cancer Key Points After lung cancer has been diagnosed, tests are done to find out if cancer cells have spread within the lungs or to other parts of the body

Availability of data and materials All data analyzed or generated during study are included in this published paper

This success rate represents a remarkable improvement over other treatment options

We defined nonsmokers as those who had never smoked or smoked less than 100 cigarettes in their lifetime, past smokers as those who had smoked at least 100 cigarettes in their lifetime but had quit smoking at the time of interview, and current smokers as those who had smoked 100 cigarettes in their lifetime and currently still smoke cigarettes at the time of diagnosis