The 19-bp deletion polymorphism of dihydrofolate reductase (DHFR) and nonsyndromic cleft lip with or without cleft palate: evidence for a protective role . J Appl Oral Sci [Internet]. 2015 Jun. 1 [cited 2024 May 6];23(3):272-8. Available from: https://www.revistas.usp.br/jaos/article/view/101007