this story is a result of my life as an investigator and my laboratory is part of the national institute of alcohol abuse and alcoholics. brookhaven national laboratories is where i keep my laboratory. >> host: fully funded by the u.s. taxpayer. both of. >> guest: there are no private companies. >> host: dr. nora volkow conducted the most recent cell phone study which you can find on line at c-span.org/ communicators. dr. volkow thank you for being with us. >> guest: thank you for having me. >> host: now joining us on "the communicators" is dr. kenneth foster who is at a new engineering professor at the university of pennsylvania who has done a lot of research on radiofrequency energy. dr. foster we have been talking with dr. volkow about cell phone studies conducted by her group with nih. what is your opinion of this study? >> guest: well, think it will be very hard to interpret. for one thing, the subjects received almost no exposure and the effect they reported was very small. and so, it will be very hard to understand what it means. >> host: does it matter what kind of phone they use in this study? >> guest: well, it does. thi