She agreed , but only on the promise that he would do it on her rather than on himself .
He ignored his department chief and persuaded the operating - room nurse in charge of the sterile supplies , Gerda Ditzen , to assist him .
Gerda Ditzen agreed , but only on the promise that he would do it on Gerda Ditzen rather than on himself .
He ignored his department chief and persuaded the operating - room nurse in charge of the sterile supplies , Gerda Ditzen , to assist him .