19. Lima F, Khamashta MA, Buchanan NM, Kerslake S, Hunt BJ, Hughes GR. A study of sixty pregnancies in patients with the antiphospholipid syndrome. Clin Exp Rheumatol 1996; 14: 131–6
20. Yamada H, Atsumi T, Kobashi G, Ota C, Kato EH, Tsuruga N, et al. Antiphospholipid antibodies increase the risk of pregnancy-induced hypertension and adverse pregnancy outcomes. J Reprod Immunol 2009; 79: 188–95