Expression of placental growth factor–1 (PlGF-1) in synovial tissue from rheumatoid arthritis (RA) patients: Role on inflammation and on DHEAS to DHEA conversion - Capellino, S; Schiechl, G; Weidler, C; Anders, S; Baerwald, CGO; Buttgereit, F; Straub, R (Experimental and Clinical Endocrinology & Diabetes, 2007)