For many years doctors have been aware that smoking affects men and women in different ways.<br />Recently, they say, there has been a surge in the number of cases of colon cancer. Now a team of Norwegian researchers says women smokers are specifically at risk.<br />The researchers looked into the medical histories of more than 600,000 people over the course of 30 years.<br />So far doctors cannot explain why smoking seems to attack the female digestive system more aggressively than the male.<br />One leading cancer specialist says this new research is a warning to women.<br />Al Jazeera's Dominic Kane explains.
