Omega-3 fatty acid supply in pregnancy for risk reduction of preterm and early preterm birth by Cetin, I, Carlson, SE, Burden, C, da Fonseca, EB, di Renzo, GC, Hadjipanayis, A, Harris, WS, Kumar, KR, Olsen, SF, Mader, MS, McAuliffe, FM, Muhlhausler, B, Oken, E, Poon, LC, Poston, L, Ramakrishnan, U, Roehr, CC, Savona-Ventura, C, Smuts, CM, Sotiriadis, A, Su, K-P, Tribe, RM, Vannice, G, Koletzko, B