Shang KZ. Evolution of gastrointestinal double contrast radiography in China: researches, application and popularization. World J Gastroenterol 1998; 4(3): 197-201 [PMID: 11819274 DOI: 10.3748/wjg.v4.i3.197]
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Ke Zhong Shang, Department of Radiology, Shanghai Sixth People’s Hospital, 600 Yishan Rd, Shanghai 200233, China
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