Submitted on: 25 September 2016.
Revised on: 22 December 2016.
Accepted on: 12 January 2017.
___________________Journal of Geriatric Cardiology
http://reply.papertrans.cn/2/171/17040/17040-32.png
http://reply.papertrans.cn/2/171/17040/17040-33.png
Submitted on: 26 December 2017.
Revised on: 24 April 2018.
Accepted on: 05 June 2018.
___________________Journal of Geriatric Cardiology
http://reply.papertrans.cn/2/171/17040/17040-35.png
Submitted on: 22 September 2019.
Revised on: 08 January 2020.
Accepted on: 22 February 2020.
___________________Journal of Geriatric Cardiology