1. Department of Clinical Biochemistry, Immunology & Genetics; Statens Serum Institut; Artillerivej 5, 85/240; DK-2300; Copenhagen S; Denmark
2. Department of Dermatology; Bispebjerg Hospital; Bispebjerg Bakke 23; DK-2400; Copenhagen; NV; Denmark
3. Medical Prognosis Institute; Venlighedsvej 1; DK-2970; H⊘rsholm; Denmark
4. Department of Infectious Diseases and Rheumatology; Rigshospitalet; Copenhagen University Hospital; Blegdamsvej 9; DK-2100; Copenhagen Ø; Denmark