dr. johnston.[applause] >> thank you very much, and good morning to all of you. pleased that so many of you have turned out. it's a pleasure to, again, be able to announce results from the study, joining the director, assistant secretary koh, director volkow. we all did this last year and hopefully next. despite all those years, i actually get younger -- [laughter] each time we do a survey. special arrangements upstairs. um, you heard a lot of the results of the release, so i'm going to sort of focus on some of the highlights that i think are most interesting and most important this year. one of those has to do with bath salts. you've heard a lot in the press about bath salts and how dangerous they can be, and i think i believe that. but i don't believe there's been any very good empirical evidence of how extensive their use is. and for the first time this year we had it in the survey, and we find, fortunately, that the results are very low levels of use. a little over 1% have used in the past year