5Mosca S, Manes G, Martino R,et al. Endoscopic management foreign bodies in the upper gastrointestinal tract: report on a serie of 414 adult patients[J]. Eudoscopy,2001,33(8) :692.
1Singh P,Mukhopadhyay P, Bhatt B, et al. Endoscopic ultra- sound versus CT scan for detection of the metastases to the liver : results of a prospective comparative study [ J ]. J Clin Gastroenterol,2009,43 (4) : 367 - 373.
2Chen JC, Smith ER, Cahill M, et al. The opioid receptor binding of dezocine, morphine, fentanyl, butorphanol and nalbuphine[ J]. Life Sci,1993,52(4) :389 -396.
