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Start Over You searched for: Creator Liroff, Kenneth P. ✖ Remove constraint Creator: Liroff, Kenneth P. Subject Pacemaker, Artificial ✖ Remove constraint Subject: Pacemaker, Artificial Genre Memorandums ✖ Remove constraint Genre: Memorandums Story Section Expanding Technological Possibilities, 1955-1970 ✖ Remove constraint Story Section: Expanding Technological Possibilities, 1955-1970