Venous thromboembolism in the antiphospholipid syndrome: management guidelines for secondary prophylaxis. - Meroni,P.L.; Moia,M.; Derksen,R.H.; Tincani,A.; McIntyre,J.A.; Arnout,J.M.; Koike,T.; Piette,J.C.; Khamashta,M.A.; Shoenfeld,Y. (Lupus, 2003)