贫困农村和富裕城市6月龄婴儿粪钙卫蛋白水平的差异及其影响因素
빈곤농촌화부유성시6월령영인분개위단백수평적차이급기영향인소
Differences in fecal calprotectin levels of six-month-old infants in poor rural and affluent urban areas in China and its determinants
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