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Wongsiridej, P.; Ngerncham, S.; Usaha, S.; Chandranipapongse, W.; Tim R. Cressey; Bowornkitiwong, W. Serum Theophylline Concentrations in very Preterm Neonates Receiving Intravenous Aminophylline for Apnea. Siriraj Med J 2021, 73, 526-531.