1.    Allen LH, Rosado JL, Casterline JE, Martinez H, Lopez P, et al. Vitamin B-12 deficiency and malabsorption are highly prevalent in rural Mexican communities. Am J Clin Nutr. 1995;62(5):1013-9.

2.    Allen LH. Impact of vitamin B-12 deficiency during lactation on maternal and infant health. Adv Exp Med Biol. 2002;503:57-67.

3.    Andersson HC, Shapira E. Biochemical and clinical response to hydroxocobalamin versus cyanocobalamin treatment in patients with methylmalonic acidemia and homocystinuria (cblC). J Pediatr. 1998;132(1):121-4.

4.    Baker SJ, Ignatius M, Johnson S, Vaish SK. Hyperpigmentation of skin. A sign of vitamin-B12 deficiency. Br Med J. 1963;1(5347):1713-5.

5.    Bjørke Monsen AL, Ueland PM, Vollset SE, Guttormsen AB, Markestad T, et al. Determinants of cobalamin status in newborns. Pediatrics. 2001;108(3):624-30.

6.    Briddon A. Homocysteine in the context of cobalamin metabolism and deficiency states. Amino Acids. 2003;24(1-2):1-12.

7.    Campbell CD, Ganesh J, Ficicioglu C. Two newborns with nutritional vitamin B12 deficiency: challenges in newborn screening for vitamin B12 deficiency. Haematologica. 2005;90(12):ECR45.

8.    Casterline JE, Allen LH, Ruel MT. Vitamin B-12 deficiency is very prevalent in lactating Guatemalan women and their infants at three months postpartum. J Nutr. 1997;127(9):1966-72.

9.    Coman D, Bhattacharya K. Extended newborn screening: an update for the general paediatrician. J Paediatr Child Health. 2012;48(3):E68-72.

10. Demir N, Koc A, Üstyol L, Peker E, Abuhandan M. Çocuklarda B12 vitamini eksikliğinin nörolojik bulguları: 42 olgunun değerlendirilmesi. Çocuk Dergisi. 2015;15(2):67-72.

11. Dietary Reference Intakes (DRIs): Recommended Dietary Allowances and Adequate Intakes, Vitamins. Institute of Medicine (US) Standing Committee on the Scientific Evaluation of Dietary Reference Intakes. Washington (DC): National Academies Press (US); 1998.

12. Dror DK, Allen LH. Effect of vitamin B12 deficiency on neurodevelopment in infants: current knowledge and possible mechanisms. Nutr Rev. 2008;66(5):250-5.

13. Duchen L, Jacobs J. Nutritional deficiencies and metabolic disorders. In: Adams J, Duchen LW, eds. Greenfield's Neuropathology. New York, NY: Oxford University Press; 1992:826-34.

14. Emery ES, Homans AC, Colletti RB. Vitamin B12 deficiency: a cause of abnormal movements in infants. Pediatrics. 1997;99(2):255-6.

15. Fréry N, Huel G, Leroy M, Moreau T, Savard R, et al. Vitamin B12 among parturients and their newborns and its relationship with birthweight. Eur J Obstet Gynecol Reprod Biol. 1992;45(3):155-63.

16. García-Casal MN, Osorio C, Landaeta M, Leets I, Matus P, et al. High prevalence of folic acid and vitamin B12 deficiencies in infants, children, adolescents and pregnant women in Venezuela. Eur J Clin Nutr. 2005;59(9):1064-70.

17. Genişletilmiş Yenidoğan Tarama Programı Uygulama Rehberi. T.C. Sağlık Bakanlığı, Halk Sağlığı Genel Müdürlüğü; 2021.

18. Gilliam JN, Cox AJ. Epidermal changes in vitamin B12 deficiency. Arch Dermatol. 1973;107(2):231-6.

19. Graham SM, Arvela OM, Wise GA. Long-term neurologic consequences in a breast-fed infant of a mother with pernicious anaemia. J R Soc Med. 1992;85(11):656-8.

20. Grange DK, Finlay JL. Nutritional vitamin B12 deficiency in a breastfed infant following maternal gastric bypass. Pediatr Hematol Oncol. 1994;11(3):311-8.

21. Grattan-Smith PJ, Wilcken B, Procopis PG, Wise GA. The neurological syndrome of infantile cobalamin deficiency: developmental regression and involuntary movements. Mov Disord. 1997;12(1):39-46.

22. Guerra-Shinohara EM, Morita OE, Peres S, Pagliusi RA, Sampaio Neto LF, et al. Low ratio of S-adenosylmethionine to S-adenosylhomocysteine is associated with vitamin deficiency in Brazilian pregnant women and newborns. Am J Clin Nutr. 2004;80(5):1312-21.

23. Hartmann H, Das AM, Lücke T. Clinical presentation and metabolic consequences in 40 breastfed infants with nutritional vitamin B(12) deficiency: What have we learned? Eur J Paediatr Neurol. 2011;15(5):377-83.

24. Hashim G, Moscarello M. Myelin structure, chemistry and immunology. In: Rosenberg R, ed. The Clinical Neurosciences. Vol 5. New York, NY: Churchill Livingstone; 1983:19-35.

25. Healton EB, Savage DG, Brust JC, Garrett TJ, Lindenbaum J. Neurologic aspects of cobalamin deficiency. Medicine (Baltimore). 1991;70(4):229-45.

26. Keskin N, Aydın K, Çelik N, Yıldız İ. Yenidoğan döneminde genişletilmiş tarama programında propionil karnitin yüksekliği saptanan bebeklerde maternal B12 vitamini durumu. Türk Pediatri Arşivi. 2021;56(1):45-51.

27. Korenke GC, Hunneman DH, Eber S, Hanefeld F. Severe encephalopathy with epilepsy in an infant caused by subclinical maternal pernicious anaemia: case report and review of the literature. Eur J Pediatr. 2004;163(4-5):196-201.

28. Kunze K, Leitenmaier K. Vitamin B12 deficiency and subacute combined degeneration of the spinal cord (funicular spinal disease). In: Vinken P, Bryun GW, eds. Handbook of Neurology. Vol 28. Amsterdam: Elsevier; 1976:141-98.

29. Kühne T, Bubl R, Baumgartner R. Maternal vegan diet causing a serious infantile neurological disorder due to vitamin B12 deficiency. Eur J Pediatr. 1991;150(3):205-8.

30. Lipton SA, Kim WK, Choi YB, Kumar S, D'Emilia DM, et al. Neurotoxicity associated with dual actions of homocysteine at the N-methyl-D-aspartate receptor. Proc Natl Acad Sci U S A. 1997;94(11):5923-8.

31. Louwman MW, van Dusseldorp M, van de Vijver FJ, Thomas CM, Schneede J, et al. Signs of impaired cognitive function in adolescents with marginal cobalamin status. Am J Clin Nutr. 2000;72(3):762-9.

32. Lövblad K, Ramelli G, Remonda L, Nirkko AC, Ozdoba C, et al. Retardation of myelination due to dietary vitamin B12 deficiency: cranial MRI findings. Pediatr Radiol. 1997;27(2):155-8.

33. Marble M, Copeland S, Khanfar N, Rosenblatt DS. Neonatal vitamin B12 deficiency secondary to maternal subclinical pernicious anemia: identification by expanded newborn screening. J Pediatr. 2008;152(5):731-3.

34. McPhee AJ, Davidson GP, Leahy M, Beare T. Vitamin B12 deficiency in a breast fed infant. Arch Dis Child. 1988;63(8):921-3.

35. Molloy A, Weir D. Homocysteine and the nervous system. In: Jacobsen D, ed. Homocysteine in Health and Disease. Cambridge: Cambridge University Press; 2001:183-97.

36. Monagle PT, Tauro GP. Infantile megaloblastosis secondary to maternal vitamin B12 deficiency. Clin Lab Haematol. 1997;19(1):23-5.

37. Monsen AL, Refsum H, Markestad T, Ueland PM. Cobalamin status and its biochemical markers methylmalonic acid and homocysteine in different age groups from 4 days to 19 years. Clin Chem. 2003;49(12):2067-75.

38. Özdemir Ö, Gür E, Can G. İstanbul'da bir sağlık ocağı bölgesindeki gebe kadınlarda B12 vitamini eksikliği prevalansı. Türkiye Aile Hekimliği Dergisi. 2018;22(3):112-8.

39. Rosenblatt DS, Whitehead VM. Cobalamin and folate deficiency: acquired and hereditary disorders in children. Semin Hematol. 1999;36(1):19-34.

40. Scalabrino G, Carpo M, Bamonti F, Pizzinelli S, D'Avino C, et al. High tumor necrosis factor-alpha levels in cerebrospinal fluid of cobalamin-deficient patients. Ann Neurol. 2004;56(6):886-90.

41. Scalabrino G, Peracchi M. New insights into the pathophysiology of cobalamin deficiency. Trends Mol Med. 2006;12(5):247-54.

42. Specker BL, Black A, Allen L, Morrow F. Vitamin B-12: low milk concentrations are related to low serum concentrations in vegetarian women and to methylmalonic aciduria in their infants. Am J Clin Nutr. 1990;52(6):1073-6.

43. Stollhoff K, Schulte FJ. Vitamin B12 and brain development. Eur J Pediatr. 1987;146(2):201-5.

44. Türkiye Beslenme ve Sağlık Araştırması (TBSA) 2019: Beslenme Durumu ve Alışkanlıklarının Değerlendirilmesi Sonuç Raporu. Sağlık Bakanlığı, Hacettepe Üniversitesi; 2020.

45. van Dusseldorp M, Schneede J, Refsum H, Ueland PM, Thomas CM, et al. Risk of persistent cobalamin deficiency in adolescents fed a macrobiotic diet in early life. Am J Clin Nutr. 1999;69(4):664-71.

46. von Schenck U, Bender-Götze C, Koletzko B. Persistence of neurological damage induced by dietary vitamin B-12 deficiency in infancy. Arch Dis Child. 1997;77(2):137-9.

47. Wiley V, Carpenter K, Wilcken B. Newborn screening with tandem mass spectrometry: 12 months' experience in NSW Australia. Acta Paediatr Suppl. 1999;88(432):48-51.

48. Wright JD, Bialostosky K, Gunter EW, Carroll MD, Najjar MF, et al. Blood folate and vitamin B12: United States, 1988-94. Vital Health Stat 11. 1998;(243):1-78.

49. Yılmaz S, Serin HM, Arslan N. Vejetaryen beslenen çocuk ve adolesanlarda B12 vitamini eksikliği ve metabolik belirteçler. Türk Pediatri Arşivi. 2019;54(4):215-21.

50. Zengin E, Sarper N, Caki Kiliç S. Clinical manifestations of infants with nutritional vitamin B deficiency due to maternal dietary deficiency. Acta Paediatr. 2009;98(1):98-102.