A Greek multicenter study comparing the clinical and immunologic phenotypes between adult and juvenile- onset lupus - Papachristou F; Farmaki E; Pratsidou-Gerts P; Galanopoulou V; Trachana M; Siamopoulou A; Stefanidou S; Alfantaki S; Nalbanti P; Garyphallos A; Kanakoudi-Tsakalidou F (BMC, 2011)