1 Shandong First Medical University, Taian 271000, PR China.
2 Department of Cardilogy, Liaocheng People(,)s Hospital Affiliated to Shandong First Medical University, Liaocheng 252000, PR China.
3 Department of Cardilogy, Liaocheng People(,)s Hospital Affiliated to Shandong First Medical University, Liaocheng 252000, PR China.. Electronic address: sujingli2007@163.com.