Methods:Blood samples of 100 nonsmoking female lung cancer cases versus 95 healthy controls in Shanghai and 82 versus 89 in Harbin were tested and compared.
They confirmed that while there were similarities, lung tumors from nonsmokers had many genetic changes different from the genetic changes seen in smokers.
3
因患肺癌而死亡者,约90%是吸烟所致。
Cigarette smoking is responsible for about 90% of deaths from lung cancer.