1 Department of Cardiac Surgery, Fuwai Yunnan Cardiovascular Hospital, Kunming 650032, China.
2 Department of Pediatric Cardiac Surgery, National Center of Cardiovascular Diseases and Fuwai Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100037, China.
3 Department of Medical Ultrasonics, Fuwai Yunnan Cardiovascular Hospital, Kunming 650032, China.