Budi Yulhasfi Febrianto, Eddy Sutrisno , Frank Bietra Buchari , Utama Abdi Tarigan , Hidayat, “The Polymorphism Identification of Reduced Folate Carrier 1 (RFC1) in Patients of Non Syndromic Cleft Lip with or Without Cleft Palate in Sumatera Utara”, ijetst, vol. 4, no. 10, pp. 6279–6284, Oct. 2017.