1 Department of Ultrasound, Aerospace Center Hospital, Beijing, China.
2 Department of Medicine 1, Friedrich-Alexander University (FAU), Erlangen-Nürnberg and Universitätsklinikum, Erlangen, Germany.
3 Department of Ultrasound, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.