Rosenthal LS, Mester S, Rakovec P, Penaranda JB, Sherman JR, Sheldon TJ, Zeng C, Wang P. Factors influencing pacemaker generator longevity: results from the complete automatic pacing threshold utilization recorded in the CAPTURE Trial. Pacing Clin Electrophysiol. 2010 Aug; 33(8):1020-30.