Absence of epicardial coronary stenosis in patients with systemic sclerosis with severe impairment of coronary flow reserve. Issue 2 (12th January 2006) - Vacca, A; Siotto, P; Cauli, A; Montisci, R; Garau, P; Ibba, V; Mameli, A; Passiu, G; Iliceto, S; Mathieu, A