Radiation Biology in Cancer Research, edited by . Raymond E. Meyn and H. Rodney Withers. Raven Press, New York © 1980. Medical Radiation and Possible Adverse Effects on the Human Embryo Mary Esther Gaulden and Robert C. Murry K Ae Radiation Biology Section and Radtdlogical Physics Section, Department of Radiology, The University of Texas Health Science Center at Daltas, Dallas, Texas 75235 January 23, 1981 Dr. Joshua Lederberg, President Rockefeller University 1230 York Avenue New York, NY 1002] Bear Dr. Lederberg: A few weeks ago I came across the foreword which you wrote in 197] for the book by Epstein and Legator on "Mutagenicity of Pesticides." Especially interesting was your comment: "If the malformation induced by thalidomide were a mental retardation of 10% of the I.Q., instead of a highly characteristic and unusual deformation of the limbs, in an equal number of subjects, we would be unaware of jt to this day." I am enclosing a reprint of an article I published last year whose central thesis bears on the same idea. I would like very much to | have an opportunity to discuss this subject with you when you are a on our campus for a visit in late February, and if you have the ~_ time to look over this reprint, I would appreciate any criticisms or comments you might have on it. Much more attention needs to be given to the problem of low level environmental chemical exposure (including medical pharmaceuticals) and "subtle" teratogenesis in the human. It is a fascinating subject, especially the possible involvement of the central nervous system; I am currently in the process of trying to formulate some good experimental questions with which to approach the subject. I have asked Dean Neaves' office to include, if possible, my laboratory on your schedule while you are in Dallas, and I hope that we can look forward to talking with you. Sincerely, o) Ly, f PM OME “otha OP “Mary Es er Gaulden, Ph.D. Associate Professor and Chief, Radiation Biology Section MEG: cms