1 UNIVERSITY OF CALIFORNIA SAN FRANCISCO MEDICAL CENTER 7 BERKELEY + DAVIS « IRVINE « LOS ANGELES + RIVERSIDE * SAN DIEGO * SAN FRANCISCO t i s CARDIOVASCULAR RESEARCH INSTITUTE SAN FRANCISCO, CALIFORNIA 94122 October 7, 1964 Dr. Joshua Lederberg Department of Genetics Stanford University School of Medicine 300 Pasteur Drive Palo Alto, California Dear Joshua: |[t was very good of you to send me the references and additional information on microspheres and microencapsulation. | will look into the sources in the near Future3 this technical development provides us with a number of interesting things we can do in various capillary beds. oN Sincerely, i “ JUL} H. COMROE, JR., M.D. Director JHC/el OCT 81964 a cj SANTA BARBARA * SANTA CRUZ - vi 40 Wa