Vitamin B12 insufficiency and the risk of fetal neural tube defectsBlom, H. J.Afman, L.van der, Linden I.Den Heijer, H.Author informationRadboud University Medical Centre Nijmegen, Laboratory of Pediatrics & Neurology, The Netherlands, Email: [email protected]Clinical Chemistry and Laboratory Medicine 43(3):p A3, March 2005.Copyright © 2005 Walter de Gruyter