5John P. Cloherty, Eeic C. Eichenwald, Anne R. Hansen, et al. Manual of neonatal care. 7th ed. 2011. 631.
6Patel SJ,Oshodi A, Prasad P, et al. Antibiotic use in neonatal intensive care units and adherence with centers for disease control and prevention 12 step campaign to prevent antimicmbial resistance. Pediatr Infect Dis J, 2009,28 : 1047-1051.
7Kuppala VS, Meinzen-Derr J, Morrow AL, et al. Prolonged initial empirical antibiotic treatment is associated with adverse outcomes in premature infants. J Pediatr, 2011,159:720-725.
8Cordero L, Ayers LW. Duration of empiric antibiotics for suspected early-onset sepsis in extremely low birth weight infants. Infect Control Hosp Epidemiol, 2003,24:662-666.