共 68 条
[5]
Microbubble echo-enhancers: A new direction for ultrasound?
[J].
LANCET,
1997, 349 (9069)
:1855-1856
[9]
BOLONDI L, 1992, ITAL J GASTROENTEROL, V24, P46
[10]
BOLONDI L, 1989, GASTROENTEROL INT, V2, P30