Prevalence of undiagnosed autoimmune rheumatic diseases in the first trimester of pregnancy. Results of a two-steps strategy using a self-administered questionnaire and autoantibody testing. - Spinillo A; Beneventi F; Epis OM; Montanari L; Mammoliti D; Ramoni V; Di Silverio E; Alpini C; Caporali R; Montecucco C (BJOG: An International Journal of Obstetrics & Gynaecology, 2008)