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Start Over You searched for: Creator Cohen, Richard ✖ Remove constraint Creator: Cohen, Richard Creator Kantrowitz, Adrian ✖ Remove constraint Creator: Kantrowitz, Adrian Format Text ✖ Remove constraint Format: Text Subject Heart-Assist Devices ✖ Remove constraint Subject: Heart-Assist Devices Subject Pacemaker, Artificial ✖ Remove constraint Subject: Pacemaker, Artificial Genre Articles ✖ Remove constraint Genre: Articles