[1] Royal London Hosp, Fac Med, Div Rheumatol, London E1 2DR, England
[2] Lebanese Amer Univ, Med Ctr, Rizk Hosp, Fac Med, Beirut, Lebanon
[3] Amer Univ Beirut, Fac Med, Div Rheumatol, Beirut, Hamra, Lebanon
[4] Kings Coll London, Rayne Inst, St Thomas Hosp, Div Womens Hlth,Graham Hughes Lupus Res Lab, London SE1 7EH, England