Soni Ram Chandra To compare the diagnostic yield of fine needle aspiration, surface biopsy and needle knife papillotomy assisted ampullary biopsy in periampullary tumours Soni Ram Chandra; Dr. A. S. Puri Gu.; Dr. R. K. Saran Gu. - 2009 - 62p. p. cm. Standard No.: 109178 Source: Theses Subjects--Topical Terms: GASTROENTEROLOGY