Intact calibers of retinal vessels in patients with systemic sclerosis - Aissopou, E.K.; Bournia, V.-K.; Protogerou, A.D.; Panopoulos, S.; Papaioannou, T.G.; Vlachoyiannopoulos, P.G.; Matucci-Cerinic, M.; Sfikakis, P.P. (Journal of Rheumatology, 2015)