CNN Sanjay Gupta MD January 11, 2014 21:38:00
Longer term impact in terms of brain structure and function in people who start smoking early versus those who started smoking later. we like to say it's worth the wait. just give the brain time to develop before you get into this. it's an important thing to be mindful of. that's the focus of the educational efforts or should be these days. >> and i think facts matter in this discussion, which is part of the reason we wanted you on the program today. thanks so much for joining us. thank you for being part of our documentary as well. >> up next we'll talk about this epidemic that you may have h...