How do critics of genetic research on addiction explain these findings?

He is the author of many books and professional journal articles on treatment and addiction.

"There is enough evidence to show that we need more research specifically on steroids and addiction," he said.

"Football is an ego thing," he said, trying to explain a love for the game that borders on addiction.

And drug treatment programs alone, say experts on addiction, are often ineffective unless addicts have a place to live.

As an author he has written several books on graffiti, street-art, drugs and addiction.

One might think that doing it yourself would cut down on addiction in general.

For the nation's $300 billion problem, the Government is investing only $500 million in all research on addiction.

Someone wrote a love note and placed it in a book on sexual addiction.

The program used the money in part to pay for a conference on disability and addiction.