“The Polymorphism Identification of Reduced Folate Carrier 1 (RFC1) in Patients of Non Syndromic Cleft Lip with or Without Cleft Palate in Sumatera Utara”, Int. J. Emerg. Trends Sci. Technol., vol. 4, no. 10, pp. 6279–6284, Oct. 2017, Accessed: Sep. 28, 2026. [Online]. Available: http://igmpublication.com/ijetst.in/index.php/ijetst/article/view/1238