口服胃肠超声造影剂与胃镜对儿童胃十二指肠疾病诊断价值的比较
구복위장초성조영제여위경대인동위십이지장질병진단개치적비교
Contrastive Study on the Effect of Oral Gastrointestinal Contrast Agent and Gastroscopy in the Diagnosis of Gastrointestinal Duodenal Ulcer in Children
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