A new study has found that though the rates of Crohn's disease are stabilizing in older people, the incidence of the disease is rising in people ages 20 and under. Researchers at Rouen University Hospital looked at data from 1988 to 2005 and discovered that the incidence of Crohn's disease for people under 20 rose steadily during this time period, from 3.5 to 5.2 cases per 100,000 people. Scientists believe environmental factors such as smoking and diet are responsible for the increase in this...