Qin DX, Wang GQ, Wang ZY. Double blind randomized control trial of occult blood bead test and gastroscopy-pathology screening for upper digestive tract cancer. World J Gastroenterol 1998; 4(Suppl2): 66-66 [DOI: 10.3748/wjg.v4.iSuppl2.66]
Please LOGIN to submit a new comment.