Cline JM, Dixon D, Ernerudh J, Faas MM, Göhner C, Häger JD, Markert UR, Pfarrer C, Svensson-Arvelund J, Buse E. The placenta in toxicology. Part III: Pathologic assessment of the placenta. Toxicol Pathol. 2014; 42(2):339-44.