参予者的类型新生儿出生体重小于2500公克，出生24小时内证实有代谢性酸血症（动脉血液气体分析）。

Types of participants Newborn infants with birth weight <2500g and less than 24 hours of age with proven metabolic acidaemia (on arterial blood gas).

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参予者的类型新生儿出生体重小于2500公克，出生24小时内证实有代谢性酸血症（动脉血液气体分析）。

Types of participants Newborn infants with birth weight <2500g and less than 24 hours of age with proven metabolic acidaemia (on arterial blood gas).

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