https://dds.las.ac.cn/service/document?appId=a1vacbnPuv9qJRzJvdNXfsesj9JbIa6e&appKey=sPBA4vANLzjnW1k5eufEcc4k7dxfNraW&ts=1763018312903&signature=0de7a5c43b7597571c9ae1baa8a370c7&articleTitle=General+ultrasound+in+the+critically+ill&articleAuthor=Daniel+Lichtenstein&publicationTitle=General+ultrasound+in+the+critically+ill&language=&publicationType=1&publishYear=2005&isn=9783540208228&publisher=Springer+Berlin+Heidelberg