professor. susan joins me by phone now. thank you for joining me. caller: you re welcome. let me find out how you came upon the information. caller: i was doing research on my book on the syphilis study. i was doing what historians do, which is go to archives and read dead people s mail. and i found the records in the pittsburgh university of pittsburgh archives of john c. cutler, the physician who did this study in guatemala. when you realized that 696 men and women were essentially used in this experiment, what did you think when you realized what erp reading and had researched was a reality. one thing i want to correct that bob bazell said. the study was to look at whether or not penicillin could be a cure. in some cases they were given syphilis and gonorrhea, they were also given penicillin to treat it. so this was an infecting study.