1. Stoll BJ, Hansen NI, Bell EF, Walsh MC, Carlo WA, Shankaran S, et al. Trends in care practices, morbidity, and mortality of extremely preterm neonates, 1993-2012. JAMA. 2015; 314:1039–1051.
Article
2. Kusuda S, Fujimura M, Uchiyama A, Totsu S, Matsunami K. Neonatal Research Network, Japan. Trends in morbidity and mortality among very-low-birth-weight infants from 2003 to 2008 in Japan. Pediatr Res. 2012; 72:531–538.
Article
3. Stensvold HJ, Klingenberg C, Stoen R, Moster D, Braekke K, Guthe HJ, et al. Neonatal morbidity and 1-year survival of extremely preterm infants. Pediatrics. 2017; 139:e20161821.
Article
4. Horbar JD, Edwards EM, Greenberg LT, Morrow KA, Soll RF, Buus-Frank ME, et al. Variation in performance of neonatal intensive care units in the United States. JAMA Pediatr. 2017; 171:e164396.
Article
5. Kim JK, Chang YS, Sung S, Park WS. Mortality rate-dependent variations in the survival without major morbidities rate of extremely preterm infants. Sci Rep. 2019; 9:7371.
Article
6. Muglia LJ, Katz M. The enigma of spontaneous preterm birth. N Engl J Med. 2010; 362:529–535.
Article
7. Hahn WH, Chang JY, Chang YS, Shim KS, Bae CW. Recent trends in neonatal mortality in very low birth weight Korean infants: in comparison with Japan and the USA. J Korean Med Sci. 2011; 26:467–473.
Article
8. Chang YS, Park HY, Park WS. The Korean Neonatal Network: an overview. J Korean Med Sci. 2015; 30(Suppl 1):S3–S11.
Article
9. Chung SH, Bae CW. Improvement in the survival rates of very low birth weight infants after the establishment of the Korean Neonatal Network: comparison between the 2000s and 2010s. J Korean Med Sci. 2017; 32:1228–1234.
Article
10. Shah PS, Lui K, Sjörs G, Mirea L, Reichman B, Adams M, et al. Neonatal outcomes of very low birth weight and very preterm neonates: an international comparison. J Pediatr. 2016; 177:144–152.e6.
11. Fanaroff AA, Stoll BJ, Wright LL, Carlo WA, Ehrenkranz RA, Stark AR, et al. Trends in neonatal morbidity and mortality for very low birthweight infants. Am J Obstet Gynecol. 2007; 196:147–152.e6.
Article
12. Battin MR, Knight DB, Kuschel CA, Howie RN. Improvement in mortality of very low birthweight infants and the changing pattern of neonatal mortality: the 50-year experience of one perinatal centre. J Paediatr Child Health. 2012; 48:596–599.
Article
13. World Health Organization. International statistical classification of diseases and related health problems. 10th revision, 2nd ed. Geneva: World Health Organization;2004.
14. Rysavy MA, Li L, Bell EF, Das A, Hintz SR, Stoll BJ, et al. Between-hospital variation in treatment and outcomes in extremely preterm infants. N Engl J Med. 2015; 372:1801–1811.
Article
15. Stoll BJ, Hansen NI, Bell EF, Shankaran S, Laptook AR, Walsh MC, et al. Neonatal outcomes of extremely preterm infants from the NICHD Neonatal Research Network. Pediatrics. 2010; 126:443–456.
Article
16. Brumbaugh JE, Hansen NI, Bell EF, Sridhar A, Carlo WA, Hintz SR, et al. Outcomes of extremely preterm infants with birth weight less than 400 g. JAMA Pediatr. 2019; 173:434–445.
Article
17. Weiner J, Sharma J, Lantos J, Kilbride H. How infants die in the neonatal intensive care unit: trends from 1999 through 2008. Arch Pediatr Adolesc Med. 2011; 165:630–634.
18. James J, Munson D, DeMauro SB, Langer JC, Dworetz AR, Natarajan G, et al. Outcomes of preterm infants following discussions about withdrawal or withholding of life support. J Pediatr. 2017; 190:118–123.e4.
19. Puopolo KM, Mukhopadhyay S, Hansen NI, Cotten CM, Stoll BJ, Sanchez PJ, et al. Identification of extremely premature infants at low risk for early-onset sepsis. Pediatrics. 2017; 140:e20170925.
Article
20. Wynn JL, Hansen NI, Das A, Cotten CM, Goldberg RN, Sánchez PJ, et al. Early sepsis does not increase the risk of late sepsis in very low birth weight neonates. J Pediatr. 2013; 162:942–948.e1-3.
Article
21. Shane AL, Sánchez PJ, Stoll BJ. Neonatal sepsis. Lancet. 2017; 390:1770–1780.
Article
22. Knowles SJ, O'Sullivan NP, Meenan AM, Hanniffy R, Robson M. Maternal sepsis incidence, aetiology and outcome for mother and fetus: a prospective study. BJOG. 2015; 122:663–671.
Article
23. Berlak N, Shany E, Ben-Shimol S, Chertok IA, Goldinger G, Greenberg D, et al. Late onset sepsis: comparison between coagulase-negative staphylococci and other bacteria in the neonatal intensive care unit. Infect Dis (Lond). 2018; 50:764–770.
Article
24. Dong Y, Speer CP. Late-onset neonatal sepsis: recent developments. Arch Dis Child Fetal Neonatal Ed. 2015; 100:F257–F263.
Article
25. Jeon GW, Sin JB. Successful caspofungin treatment of persistent candidemia in extreme prematurity at 23 and 24 weeks' gestation. J Formos Med Assoc. 2014; 113:191–194.
Article
26. de Vries LS, Groenendaal F, Liem KD, Heep A, Brouwer AJ, van't Verlaat E, et al. Treatment thresholds for intervention in posthaemorrhagic ventricular dilation: a randomised controlled trial. Arch Dis Child Fetal Neonatal Ed. 2019; 104:F70–F75.
Article
27. Ahn SY, Chang YS, Sung SI, Park WS. Mesenchymal stem cells for severe intraventricular hemorrhage in preterm infants: phase I dose-escalation clinical trial. Stem Cells Transl Med. 2018; 7:847–856.
Article
28. Jeon GW. Surfactant preparations for preterm infants with respiratory distress syndrome: past, present, and future. Korean J Pediatr. 2019; 62:155–161.
Article
29. Kawai M. Late-onset circulatory collapse of prematurity. Pediatr Int. 2017; 59:391–396.
Article
30. Yasuoka K, Inoue H, Egami N, Ochiai M, Tanaka K, Sawano T, et al. Late-onset circulatory collapse and risk of cerebral palsy in extremely preterm infants. J Pediatr. 2019; 212:117–123.
Article
31. Helenius K, Sjörs G, Shah PS, Modi N, Reichman B, Morisaki N, et al. Survival in very preterm infants: an international comparison of 10 national neonatal networks. Pediatrics. 2017; 140:e20171264.
Article