A double blind, randomised, multicentre comparison of two doses of intravenous iloprost in the treatment of Raynaud's phenomenon secondary to connective tissue diseases.Torley, H I; Madhok, R; Capell, H A; Brouwer, R M; Maddison, P J; Black, C M; Englert, H; Dormandy, J A; Watson, H R · Annals of the Rheumatic Diseases · 1991