1. Wilson WA, Gharavi AE, Koike T, et al.: International consensus statement on preliminary classification criteria for definite antiphospholipid syndrome: report of an international workshop. Arthritis Rheum 1999, 42:1309–1311.
2. Hochberg MC: Updating the American College of Rheumatology revised criteria for the classification of systemic lupus erythematosus. Arthritis Rheum 1997, 40:1725.
3. Piette JC, Wechsler B, Francis C, Godeau P: Systemic lupus erythematosus and the antiphospholipid syndrome: reflections about the relevance of ARA criteria. J Rheumatol 1992, 19:1835–1837.
4. Piette JC, Wechsler B, Frances C, et al.: Exclusion criteria for primary antiphospholipid syndrome. J Rheumatol 1993, 20:1802–1804.
5. Alarcon-Segovia D, Sanchez-Guerrero J: Primary antiphospholipid syndrome. J Rheumatol 1989, 16:482–488.