1 Department of Andrology, Liaocheng People's Hospital and clinical school of Taishan Medical University, Liaocheng 252000, PR China.
2 Clinical laboratory, Liaocheng People's Hospital and Clinical School of Taishan Medical University, Liaocheng, 252000 PR China.
3 Department of Cardiology, Liaocheng People's Hospital and clinical school of Taishan Medical University, Liaocheng 252000, PR China.
4 Department of Cardiology, Liaocheng People's Hospital and clinical school of Taishan Medical University, Liaocheng 252000, PR China. Electronic address: yaohc66@126.com.