Genes boost lung cancer risk five times, study says

From CTV.com in Canada.

...Genetic variations, along with having a strong lung cancer family history, will lead to a five times increased risk of developing the disease, a new study suggests.... ...In fact, people who have a family history of lung cancer and two copies of the genetic variations have between a 5.7 and 7.2-fold increased risk of developing lung cancer.... ...Researchers have long believed there is a genetic component to lung cancer because many smokers don't get the disease....