1. Bag N, Kim MJ. Effect of initial empirical antibiotics duration on neonatal outcomes in very low birth weight infants. Korean J Perinatol. 2012; 23:69–75.
2. Kuppala VS, Meinzen-Derr J, Morrow AL, Schibler KR. Prolonged initial empirical antibiotic treatment is associated with adverse outcomes in premature infants. J Pediatr. 2011; 159:720–5.
Article
3. Chang YS. Nutritional support in premature infants. Hanyang Med Rev. 2011; 31:246–53.
Article
4. Shalabi M, Adel M, Yoon E, Aziz K, Lee S, Shah PS, et al. Risk of infection using peripherally inserted central and umbilical catheters in preterm neonates. Pediatrics. 2015; 136:1073–9.
Article
5. Yang SR, Shin HB, Lee NM, Yi DY, Kim H, Yun SW, et al. Central venous catheter-related cardiac tamponade in premature infants: a report of two cases and a literature review. Korean J Perinatol. 2015; 26:250–4.
Article
6. Arnts IJ, Bullens LM, Groenewoud JM, Liem KD. Comparison of complication rates between umbilical and peripherally inserted central venous catheters in newborns. J Obstet Gynecol Neonatal Nurs. 2014; 43:205–15.
Article
7. Shin SH, Kim HW, Jung YH, Shin SH, Kim EK, Kim HS. Restricted usage of prophylactic antibiotics in extremely low birth weight infants for earlyonset sepsis as quality improvement program. Neonatal Med. 2016; 23:198–202.
Article
8. Lisonkova S, Sabr Y, Butler B. International comparisons of preterm birth: higher rates of late preterm birth are associated with lower rates of stillbirth and neonatal death. BJOG. 2012; 119:1630–9.
Article
9. Ananth CV, Friedman AM, Gyamfi-Bannerman C. Epidemiology of moderate preterm, late preterm and early term delivery. Clin Perinatol. 2013; 40:601–10.
Article
10. Trembath AN, Iams JD, Walsh M. Quality initiatives related to moderately preterm, late preterm, and early term births. Clin Perinatol. 2013; 40:777–89.
Article
11. Garner JS, Jarvis WR, Emori TG, Horan TC, Hughes JM. CDC definitions for nosocomial infections, 1988. Am J Infect Control. 1988; 16:128–40.
Article
12. Blanchard AC, Fortin E, Rocher I, Moore DL, Frenette C, Tremblay C, et al. Central line-associated bloodstream infection in neonatal intensive care units. Infect Control Hosp Epidemiol. 2013; 34:1167–73.
Article
13. Sung KY, Lee SY. Nonoperative management of extravasation injuries associated with neonatal parenteral nutrition using multiple punctures and a hydrocolloid dressing. Wounds. 2016; 28:145–51.
14. Korean Statistical Information Service. Birth statistics [online]. 2018. [cited 2018 Aug 21]. Available from: URL:. http://kosis.kr/statHtml/statHtml.do?orgId=101&tblId=DT_1B81A15&conn_path=I2.
15. Kugelman A, Colin AA. Late preterm infants: near term but still in a critical developmental time period. Pediatrics. 2013; 132:741–51.
Article
16. Picone S, Aufieri R, Paolillo P. Infection in late preterm infants. Early Hum Dev. 2014; 90:S71–4.
Article
17. Hannet I, Erkeller-Yuksel F, Lydyard P, Deneys V, DeBruyère M. Developmental and maturational changes in human blood lymphocyte sub-populations. Immunol Today. 1992; 13:215–18.
Article
18. Marodi L. Innate cellular immune responses in newborns. Clin Immunol. 2006; 118:137–44.
19. Melville JM, Moss TJ. The immune consequences of preterm birth. Front Neurosci. 2013; 7:79.
Article
20. Escobar GJ, Puopolo KM, Wi S, Turk BJ, Kuzniewicz MW, Walsh EM, et al. Stratification of risk of early-onset sepsis in newborns ≥34 weeks' gestation. Pediatrics. 2014; 133:30–6.
Article
21. Kuzniewicz MW, Puopolo KM, Fischer A, Walsh EM, Li S, Newman TB, et al. A quantitative, risk-based approach to the management of neonatal early-onset sepsis. JAMA Pediatr. 2017; 171:365–71.
Article
22. Bauserman MS, Laughon MM, Hornik CP, Smith PB, Benjamin DK Jr, Clark RH, et al. Group B Streptococcus and Escherichia coli infections in the intensive care nursery in the era of intrapartum antibiotic prophylaxis. Pediatr Infect Dis J. 2013; 32:208–12.
Article
23. Lee SM, Chang M, Kim KS. Blood culture proven early onset sepsis and late onset sepsis in very-low-birth-weight infants in Korea. J Korean Med Sci. 2015; 30:S67–74.
Article
24. Blackwell MT, Eichenwald EC, McAlmon K, Petit K, Linton PT, McCormick MC, et al. Interneonatal intensive care unit variation in growth rates and feeding practices in healthy moderately premature infants. J Perinatol. 2005; 25:478–85.
Article
25. Alexander T, Bloomfield FH. Nutritional management of moderate-late preterm infants: survey of current practice. J Paediatr Child Health. 2019; 55:338–42.
Article
26. Vachharajani AJ, Vachharajani NA, Morris H, Niesen A, Elward A, Linck DA, et al. Reducing peripherally inserted central catheters in the neonatal intensive care unit. J Perinatol. 2017; 37:409–13.
Article
27. Bhat R, Custodio H, McCurley C, Whitehurst R, Gulati R, Jha OP, et al. Reducing antibiotic utilization rate in preterm infants: a quality improvement initiative. J Perinatol. 2018; 38:421–9.
Article
28. Kim ES. Quality improvement in neonatal intensive care units. Neonatal Med. 2018; 25:53–7.
Article