RT Journal Article SR Electronic T1 Plasma endothelin-1 concentrations in patients with retinal vein occlusions JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 126 OP 126 DO 10.1136/bjo.83.1.126c VO 83 IS 1 A1 HÓLLÓ, GÁBOR YR 1999 UL http://bjo.bmj.com/content/83/1/126.4.abstract AB