525 EAST 68th STREET, NEW YORK, N.Y. 10021 THE NEW YORK HOSPITAL-CORNELL MEDICAL CENTER DEPARTMENT OF PHARMACOLOGY (212) 472-6030 DEPARTMENT OF MEDICINE DIVISION OF CLINICAL PHARMACOLOGY SHOWEF ELLER ONE ~ __ “DR OCT 29 1980 ) Qe oe THE aes October 24, 1980 Joshua Lederberg, Ph.D. Rockefeller University NY, NY 10021 Dear Dr. Lederberg: This is a follow-up on your offer to help Bob Lahita and me obtain some radioactive procainamide from Squibb. I was unable to track back to the block in our previous attempt to obtain the material. Today, I telephoned a friend of mine currently at Squibb, Dr. Bruce Migdaloff, who said that they had radioactive procaina- mide and would send me some whenever I wanted it. I therefore expect that I can obtain it for Bob's experiments as soon as he is ready to use it. Thanks so much for your offer of help. _Sincerely yours, : L Marcus M. Reidenberg, M.D. Professor of Pharmacology and Medicine Head, Division of Clinical Pharmacology MMR/ jc CC: Robert Lahita, M.D.