Zanini MJ, Dominguez C, Fernandez-Oliva T, Sanchez O, Toda MT, Foraster M, Dadvand P, Llurba E. Urban-related environmental exposures during pregnancy and placental development and preeclampsia: a review. Curr Hypertens Rep. 2020 Sep 3;22(10):81. doi: 10.1007/s11906-020-01088-4
Williams VSL. The "unbiased" anchor: bridging the gap between DIF and item bias. Appl Meas Educ. 1997;10(3):253-67. doi: 10.1207/s15324818ame1003_4