Journal Article ESTROGEN INACTIVATION AND FOLIC ACID Get access OSCAR KOREF, OSCAR KOREF 1From the Research Department of “Laboratorios Hormona” Bogotá, Colombia Search for other works by this author on: Oxford Academic Google Scholar PAUL ENGEL PAUL ENGEL 1From the Research Department of “Laboratorios Hormona” Bogotá, Colombia Search for other works by this author on: Oxford Academic Google Scholar Endocrinology, Volume 38, Issue 2, 1 February 1946, Pages 133–135, https://doi.org/10.1210/endo-38-2-133 Published: 01 February 1946 Article history Received: 22 October 1945 Published: 01 February 1946