Objective To analyze the risk factors of bronchopulmonary dysplasia (BPD) in premature children.
目的分析引起早产儿支气管肺发育不良(BPD)的危险因素。
BACKGROUND & OBJECTIVE: It is generally recognized that developm ent of gastric cancer arises gradually from premalignant lesions (chronic atroph ic gastritis, intestinal metaplasia and dysplasia).
背景与目的:一般认为胃癌是由癌前病变(慢性萎缩性胃炎、肠化生和不典型增生)逐步发展形成的。