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机译:Caffeine citrate maintenance doses effect on extubation and apnea postventilation in preterm infants
Cent South Univ, Xiangya Hosp 2, Dept Pediat, Changsha 410011, Hunan, Peoples R China;
Hunan Normal Univ, Hunan Prov Peoples Hosp, Childrens Med Ctr, Dept Neonatol,Affiliated Hosp 1;