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China Med Univ, Dept Geriatr Cardiol, Affiliated Hosp 1, 155 Nanjing North St, Shenyang 110001, Liaoning, Peoples R China China Med Univ, Dept Geriatr Cardiol, Affiliated Hosp 1, 155 Nanjing North St, Shenyang 110001, Liaoning, Peoples R China