A prospective study of fifty-three consecutive calcium heparin treated pregnancies in patients with anti-phospholipid antibody-related fetal loss - Ruffatti, A; Orsini, A; Di Leonardo, L; Nardelli, GB; Patrassi, GM; Truscia, D; Brigato, G; Grella, P; Todesco, S (Clin Exp Rheumatol, 1997)