Childhood obesity has become a major health problem. Approximately 17 percent of U.S. children six to 17 years of age are obese--that is, their sex-and-age-specific Body Mass Index (BMI) is at or above the 95th percentile. This proportion is two-and-a-half times higher than it was 25 years ago. Obesity during childhood often carries into…

Smoking is the most preventable cause of death in our society. Tobacco use is responsible for nearly one in five deaths in the United States and the cause of premature death of approximately 2 million individuals in developed countries. Smoking accounts for at least 30% of all cancer deaths and is a major cause of heart disease, cerebrovascular…