the time to review and edith sheffer has written a book that defies easy categorization. an important response to her fascinating and terrible subject matter. on that note and please come to the stairs which are not dangerous, the author of "asperger's children". [applause] >> thank you. i made it. thank you so much for the kind introduction and the invitation to speak here today. can everyone hear me?and thank you, it's certainly an honor. i'm going to agree is anything an overview of my book "asperger's children" which focuses on the creation -- i'm getting some reverberation. which focuses on the creation of the autism diagnosis and not see vienna and i would like to be sensitive to the subject. many people in this room at least no one person, a friend, a relative,loved one who has been diagnosed with autism or asperger disorder and the material is quite disturbing . i think it's important this information be known. one in 59 children are now diagnosed on the autism spectrum. in the united states. this is up from one in i thousand in 1975. this is an exponential rise.