Baseline characteristics of the study population.

Hemoglobin in g/dl; CRP: C-Reactive Protein; malnourished defined as height-for-age <−2 SD. HIV: Human Immunodeficiency Virus. Iron deficiency defined as serum ferritin <30 ug/L. SE-score: Socio Economic Score, a sum of the following scores: parents' education (1–4), job parents (1–4) and number of assets (0–6).

血红蛋白（单位：g/dl）；CRP：C反应蛋白（C-Reactive Protein）；营养不良定义为年龄别身高Z评分低于-2个标准差。HIV：人类免疫缺陷病毒（Human Immunodeficiency Virus）。缺铁定义为血清铁蛋白低于30微克每升（ug/L）。SE-score：社会经济评分（Socio Economic Score），为以下三项得分的总和：父母受教育程度（1~4分）、父母职业（1~4分）以及家庭资产数量（0~6分）。