Micronutrients in pregnancy: current knowledge and unresolved questions. by Berti, C, Biesalski, H, Gärtner, R, Lapillonne, A, Pietrzik, K, Poston, L, Redman, C, Koletzko, B, Cetin, I

Dose-dependent effects of folic acid on blood concentrations of homocysteine: a meta-analysis of the randomized trials by Clarke, R, Frost, C, Sherliker, P, Lewington, S, Collins, R, Brattstrom, L, Brouwer, I, van Dusseldorp, M, Steegers-Theunissen, R, Cuskelly, G, Ward, M, McNulty, H, Scott, J, den Heijer, M, Blom, H, van der Put, N, Shorah, C, Malinow, MR, McMahon, M, Tobert, J, Kush, D, Joosten, E, Riezier, R, Pietrzik, K, Dierkes, J