1. Department of Cardiovascular Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
2. VIP medical service center, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
3. Department of Ultrasonography, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
4. Zhongshan School of Medicine, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.