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Russian Society of Cardiology (RSC). With the participation of Russian Scientific Society of Clinical Electrophysiology, Arrhythmology and Cardiac Pacing, Russian Association of Pediatric Cardiologists, Society for Holter Monitoring and Noninvasive Electrocardiology. Approved by the Scientific and Practical Council of the Russian Ministry of Health.
Лебедев et al. (Sun,) studied this question.