2Heintz A,Mildenberger P,Georg H,et al.Endoscopic ultrasonography in the diagnosis of regional lymph nodes in esophageal and gastric cancer.Endocscopy,1993,25:231-235.
3Aibe T,Fuji K,Okita K,et al.A fundamental study of normal layer structure of the gastrointestinal wall visualized by endoscopic ultrasonograpphy.Scand J Gastroenterol,1986,21 (suppl 123):6-15.
4Willis S,Truong S,Gribnitz S,et al.Endoscopic ultrasonography in the preoperative staging of gastric cancer:accuracy and impact on surgical therapy.Surg Endosc,2000,14:951-954.